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HAPTER

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ULTICAST

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ILTERING

What is a
Multicast?

A multicast is a packet that is sent to a subset of endstations in a LAN, or
VLAN, that belong to a

multicast group

. If the network is set up correctly,

a multicast can only be sent to an endstation if it has joined the relevant
group.

A typical use of multicasts is video-conferencing, where high volumes of
traffic need to be sent to several endstations simultaneously, but where
broadcasting that traffic to all endstations would seriously reduce
network performance.

What is Multicast
Filtering?

Multicasts are similar to broadcasts — by default, they are sent to all
endstations on a LAN or VLAN. Multicast filtering is the system by which
endstations only receive multicast traffic if they register to join specific
multicast groups. With multicast filtering, network devices only forward
multicast traffic to the ports that are connected to registered endstations.

Figure 44

The effect of multicast filtering

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Содержание SuperStack II

Страница 1: ... http www 3com com SuperStack II Switch Management Guide For units in the SuperStack II Switch 1100 3300 and 610 630 Family Management Software Version 2 50 Part No DUA1695 0BAA04 Published May 2000 ...

Страница 2: ...hnical data is provided with limited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the Uni...

Страница 3: ...WARE What is Management Software 20 Summary of Software Features 20 Software Features Explained 21 Stack Management 21 Forwarding Modes 21 Duplex Modes 22 Flow Control 23 Traffic Prioritization 23 PACE 24 Security 24 Resilient Links 25 Port Trunks 25 Broadcast Storm Control 26 Virtual LANs 26 FastIP 26 Multicast Filtering 27 Spanning Tree Protocol 27 RMON 27 Roving Analysis 28 Management 28 Defaul...

Страница 4: ...38 Obtaining a Registered IP Address 38 Subnets and Using a Subnet Mask 39 Logging in as a Default User 39 II The Management Interfaces 3 WORKING WITH THE WEB INTERFACE Accessing the Web Interface 44 Exiting the Web Interface 45 The Getting Started Pages 46 The Main Web Interface 48 The External Link Icons 49 The Management Icons 50 The Page Area 50 Navigating the Page Area 52 Making Changes in th...

Страница 5: ...vanced Stack Settings 76 Setting Up Resilient Links 79 What are Resilient Links 79 Displaying Resilient Link Pairs 80 Creating a Resilient Link Pair 80 Deleting a Resilient Link Pair 81 Swapping the Active Port of a Resilient Link Pair 81 Setting Up Port Trunks 81 What are Port Trunks 82 Displaying the Ports that Belong to Each Port Trunk 82 Placing Ports in a Port Trunk 82 Configuring VLANs 83 Wh...

Страница 6: ...ss the Interface 97 About the Interface Menus 97 Entering Commands 99 Displaying Menus 100 Obtaining Help 100 A Quick Guide to the Commands 101 Displaying and Changing Bridging VLANs Information 105 Setting the Bridge Address Aging Time 105 Displaying Bridge Information 105 Enabling and Disabling IGMP Snooping 107 Enabling and Disabling Router Port Auto Discovery 108 Manually Identifying a Router ...

Страница 7: ...the Speed and Duplex Mode 121 Enabling and Disabling Auto negotiation 121 Enabling and Disabling Flow Control 123 Displaying Port Statistics 123 Packet Size Analysis 126 Displaying Port Summary Information 126 Displaying and Changing System Feature Information 127 Setting up a Roving Analysis Port 127 Displaying the Roving Analysis Port Information 127 Removing a Roving Analysis Port 128 Starting ...

Страница 8: ...f the Command Line Interface 141 Returning the Focus to the Previous Switch Unit 142 Specifying Stack Administration Details 142 Displaying Switch Administration Details 143 Displaying Stack Summary Information 144 Configuring Intelligent Modules 146 Setting Module Configuration 146 Displaying Module Configuration 146 Enabling and Disabling the Module Interface 146 Changing Your Password 147 Speci...

Страница 9: ...T Tagging 167 Using IEEE 802 1Q Learning 167 Forwarding Traffic Containing Unknown 802 1Q Tags 168 Connecting VLANs to Other VLANs 170 Connecting to VLANs on Legacy Switch Units 170 VLAN Configuration for Beginners 171 Simple Example Using Untagged Connections 171 Simple Example Untagged Connections with Hubs 172 Simple Example 802 1Q Tagged Connections 174 VLAN Configuration Advanced Examples 177...

Страница 10: ...STP 194 How STP Works 196 STP Requirements 196 STP Calculation 197 STP Configuration 197 STP Reconfiguration 197 An Example 198 STP Configurations 199 Using STP on a Network with Multiple VLANs 201 Connecting to STP Systems on Legacy Switch Units 202 Enabling STP 202 10 RMON What is RMON 204 The RMON Groups 204 Statistics 204 History 204 Alarms 204 Hosts 205 Hosts Top N 205 Matrix 205 Events 205 B...

Страница 11: ...Problems 218 Solving Serial Web Utility Problems 219 Solving Management Software Upgrade Utility Problems 220 Solving Other Problems 221 V Appendices and Index A SERIAL WEB UTILITY Introduction 227 Installing the Serial Web Utility 227 Using the Serial Web Utility 229 B MANAGEMENT SOFTWARE UPGRADE UTILITY Using the Upgrade Utility 231 GLOSSARY INDEX ...

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Страница 13: ...ngle unit However a stack can contain a single Switch In the case of the 610 630 family stackability is not supported If the information in the release notes that are shipped with your product differs from the information in this guide follow the instructions in the release notes Conventions Table 1 and Table 2 list conventions that are used throughout this guide Table 1 Notice Icons Icon Notice T...

Страница 14: ...d exactly as shown and then press Return or Enter Commands appear in bold Example To display port information enter the following command bridge port detail The words enter and type When you see the word enter in this guide you must type something and then press Return or Enter Do not press Return or Enter when an instruction simply says type Keyboard key names If you must press two or more keys s...

Страница 15: ...rent software release including new features modifications and known problems SuperStack II Switch Help This help provides information about the web interface software of the Switch It is supplied on the SuperStack II Switch Family CD ROM SuperStack II Switch README File This file provides information about the current software release including new features modifications and known problems In add...

Страница 16: ..._comments 3com com Please include the following information when commenting Document title Document part number on the title page Page number if appropriate Example SuperStack II Switch Management Guide Part Number DUA1695 0BAA04 Page 21 Product Registration You can now register your SuperStack II Switch on the 3Com web site to receive up to date information on your product http www 3com com produ...

Страница 17: ...I GETTING STARTED WITH MANAGEMENT Chapter 1 SuperStack II Switch Management Software Chapter 2 Setting Up for Management ...

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Страница 19: ... contains introductory information about the SuperStack II Switch management software and how it can be used in your network It covers the following topics What is Management Software Summary of Software Features Software Features Explained Default Settings ...

Страница 20: ...ported on 610 630 units Supported for up to four Switch units stackability not supported on 610 630 units Forwarding Modes Store and Forward Fast Forward Fragment Free Intelligent Store and forward Duplex Modes Half and full duplex on all ports Half and full duplex on all ports Flow Control Supported on all ports Supported on all ports Traffic Prioritization Supported Supported PACE Supported on a...

Страница 21: ...ou to interconnect up to four units using Matrix Cables For information about stacking Switch units refer to Chapter 2 of the relevant Switch User Guide Forwarding Modes Units in the Switch 3300 630 family support Store and Forward packet forwarding mode In this mode received packets are buffered entirely before they are forwarded which ensures that only good packets are forwarded to their destina...

Страница 22: ...ast Forward If the Switch detects 20 or more errors a second the forwarding mode is set to Store and Forward until the number of errors a second returns to zero For information about setting the forwarding mode for units in the Switch 1100 610 family see Configuring the Advanced Stack Settings on page 76 Duplex Modes All the ports on your Switch can be set to one of two duplex modes Half duplex Al...

Страница 23: ...ion Your Switch supports IEEE 802 1p traffic prioritization which allows data that has been assigned a high priority to be forwarded through the Switch without being obstructed by other data The system works by using the multiple traffic queues that are present in the hardware of the Switch high priority traffic is forwarded on a different queue from other traffic and it is always given preference...

Страница 24: ... interference can occur because access to the bandwidth is unequally allocated to traffic in one direction The Interactive Access feature allocates the available bandwidth equally in both directions therefore increasing the quality of the multimedia traffic For information about enabling PACE on an individual port see Configuring a Port on page 59 For information about enabling PACE on a whole Swi...

Страница 25: ...link Each main and standby link pair is referred to as a resilient link pair Resilient links are a simple method of creating redundancy that provides you with an instant reaction to link failure Resilient links are quick to set up you have full control over their configuration and the port at the other end of the resilient link does not have to support any resilience feature For more information a...

Страница 26: ...ork without being restricted by physical connections a drawback of traditional network design As an example with VLANs you can segment your network according to Departmental groups For example you can have one VLAN for the Marketing department another for the Finance department and another for the Development department Hierarchical groups For example you can have one VLAN for directors another fo...

Страница 27: ...rallel paths for network traffic and uses a loop detection process to Discover the efficiency of each path Enable the most efficient path that is the one that has the highest bandwidth Disable the less efficient paths Enable one of the less efficient paths if the most efficient path fails For information about STP see Spanning Tree Protocol on page 193 For information about enabling STP see Config...

Страница 28: ...Analysis Ports on page 86 Management Your Switch can be managed using three methods Web interface management The Switch has an internal set of web pages that allow you to manage it using any Java enabled Web browser You can access the web interface using A management workstation connected over the network A management workstation connected to the console port of the Switch running the Serial Line ...

Страница 29: ...anently set to full duplex Flow Control Enabled in half duplex auto negotiated in full duplex Enabled in half duplex auto negotiated in full duplex PACE Disabled Disabled Security Disabled Disabled Broadcast Storm Control Enabled Enabled BOOTP Enabled Enabled Virtual LANs VLANs All ports belong to the untagged Default VLAN VLAN 1 only 802 1Q learning is disabled All ports belong to the untagged De...

Страница 30: ...s over 1 min Enabled High threshold 20 errors per second Notify Low threshold 1 error per second No action Enabled High threshold 20 errors per second Notify Low threshold 1 error per second No action Table 4 Default Settings Switch 1100 610 Family Switch 3300 630 Family ...

Страница 31: ...s required before you can configure a Switch to suit the needs of your network It covers the following topics Methods of Managing a Switch Setting Up Web Interface Management Setting Up Command Line Interface Management Setting Up SNMP Management Managing a Switch Over the Network Logging in as a Default User ...

Страница 32: ...browser Command line interface management Each Switch has a command line interface that allows you to manage the Switch SNMP management You can manage a Switch using any Network Manager running the Simple Network Management Protocol SNMP such as 3Com Transcend Enterprise Manager software For maximum manageability we recommend that you use 3Com Transcend Enterprise Manager software Figure 1 shows e...

Страница 33: ...rt of the Switch has a male 9 pin d type connector You can find a pin out diagram for the cable in your Switch User Guide To connect the cable a Attach the female connector on the cable to the male connector on the console port of the Switch b Tighten the retaining screws on the cable to prevent it from being loosened c Connect the other end of the cable to your management workstation 2 The manage...

Страница 34: ...orld Wide Web if you can browse an IP stack is installed 3 Your management workstation must be connected to the Switch using a port that is in VLAN 1 the Default VLAN By default all ports on the Switch are in VLAN 1 For more information about VLANs see Virtual LANs VLANs on page 163 Installing Online Help and Documentation The CD ROM supplied with your Switch contains online help and online docume...

Страница 35: ... are accessed using the index htm file We recommend that you copy the help and the docs directory as a whole to maintain the structure of the files CAUTION When entering file paths and URLs ensure that you use characters rather than characters to define drives and directories The web interface only understands UNIX file path conventions Choosing a Browser To display the web interface correctly you...

Страница 36: ...onnector You can find pin out diagrams for both cables in your Switch User Guide To connect the cable a Attach the female connector on the cable to the male connector on the console port of the Switch b Tighten the retaining screws on the cable to prevent it from being loosened c Connect the other end of the cable to your terminal terminal emulator or modem 2 The terminal terminal emulator or mode...

Страница 37: ...re in VLAN 1 For more information about VLANs see Virtual LANs VLANs on page 163 4 To open the Telnet session you must specify the IP address of the Switch Check the documentation supplied with the Telnet facility if you are unsure how to do this Setting Up SNMP Management Any network management application running the Simple Network Management Protocol SNMP can manage a Switch if The correct MIBs...

Страница 38: ...e device resides The second part 100 8 in the example identifies the device within the network If your network is internal to your organization only you may use any arbitrary IP address We suggest you use addresses in the series 192 168 100 X where X is a number between 1 and 254 with a subnet mask 255 255 255 0 Use the default SLIP address of 192 168 101 1 with a subnet mask of 255 255 255 0 Thes...

Страница 39: ...he corresponding bit in the IP address as part of the original network number or as part of the subnet number These bits in the mask are set to 0 if the device is to treat the bit as part of the device number If you are unsure about what mask to use we suggest that you use a general mask 255 255 0 0 which corresponds to the example address used in the previous sections Logging in as a Default User...

Страница 40: ...cess you must change all default passwords as soon as possible security security security the user can access and change all manageable parameters admin no password security the user can access and change all manageable parameters Table 5 Default Users User Name Default Password Access Level ...

Страница 41: ...II THE MANAGEMENT INTERFACES Chapter 3 Working With the Web Interface Chapter 4 Working With the Command Line Interface ...

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Страница 43: ...rface The Getting Started Pages The Main Web Interface Configuring the Current Switch Changing the Management Settings for the Stack Configuring the Stack Displaying Statistics for the Current Switch Throughout this chapter the term stack refers to a number of Switch units that are managed as a single unit However a stack can contain a single Switch ...

Страница 44: ...rk To access the web interface over the network take the following steps 1 Ensure that your network is correctly set up for management using the web interface For more information see Setting Up Web Interface Management on page 33 2 Open your Web browser 3 In the Location field of the browser enter the URL of the stack This must be in the format http nnn nnn nnn nnn where nnn nnn nnn nnn is the IP...

Страница 45: ...ts occur If you are accessing the web interface for the first time a set of Getting Started pages are displayed These are described in The Getting Started Pages on page 46 If you have accessed the web interface before the main web interface is displayed For information about the interface see The Main Web Interface on page 48 If you are unable to access the web interface see Solving Web Interface ...

Страница 46: ...criptive name for the stack 2 Whether you want to allocate IP information for the stack or whether you want a BOOTP server if you have one to allocate the information automatically If you choose to allocate IP information yourself you are prompted to enter the following information An IP address for the stack For more information about IP addresses see Managing a Switch Over the Network on page 38...

Страница 47: ...e the online help and online documentation is stored see Installing Online Help and Documentation on page 34 4 A new password for the current user enter the existing password if you want to leave the password unchanged Once you have completed the Getting Started pages the main web interface is displayed For information about the interface see The Main Web Interface on page 48 The Getting Started p...

Страница 48: ...ce For more information about the External Links see The External Link Icons on page 49 The Side bar This is always displayed down the left side of the browser window It contains Management Icons that allow you to display web pages in the page area below For more information see The Management Icons on page 50 The Page Area This is always displayed in the center of the browser window It contains t...

Страница 49: ...umentation on page 34 If you have set up the online documentation clicking the Documentation icon allows you to access the User Guides and Management Guide for the stack in a second browser window For information about setting up the online documentation see Installing Online Help and Documentation on page 34 If your management workstation has access to the World Wide Web clicking the 3Com Library...

Страница 50: ...to display the status of the ports It is always displayed above the other Unit pages Color Key This page allows you to display the color coding information used by the Switch Graphic page Port Summary This page allows you to display the speed and duplex mode of the ports shown in the graphic on the Switch Graphic page Table 7 Management Icons and their actions Management Icon Action Management Set...

Страница 51: ...s page allows you to change your password Location This page allows you to specify the physical location of the stack Getting Started This page allows you to access the Getting Started pages for the stack Documentation This page allows you to specify the location of the online help and documentation for the stack Contact This page allows you to specify the details of a person to contact about the ...

Страница 52: ...o display statistics for the current Switch in the stack Unit Graph This page allows you to display a range of statistics for all the ports on the Switch Port Graph This page allows you to display a range of statistics for a specific port on the Switch For more information see Displaying Statistics for the Current Switch on page 91 Navigating the Page Area To access the first page of each category...

Страница 53: ...setting on a page in the page area you must click the Apply button at the bottom right of the page to make the change to the stack The change is only made when you click the Apply button If you make changes on a page but do not wish to apply them click the Back button in your Web browser to exit the page ...

Страница 54: ...the Switch using the Switch Graphic page To access the page Click the Unit icon on the side bar The Switch Graphic page is displayed containing a graphic of the Switch similar to Figure 6 Note that this page is always displayed above the other Unit pages Figure 6 The Switch graphic Displaying the Color Codes Used by the Switch Graphic The Switch graphic indicates the status of a port using color c...

Страница 55: ...age If you have an Expansion Module fitted to your Switch the Expansion Module port numbers follow on sequentially from the number of fixed ports Refreshing the Switch Graphic The Switch graphic does not update itself automatically if you make a change to the status of a port you need to click the Refresh hotlink positioned under the Switch graphic If after clicking Refresh the Switch graphic does...

Страница 56: ...page The Unit Status page contains the following elements System Name Displays the name given to the Switch during the Getting Started procedure For information about assigning a new name for the Switch see Specifying a Descriptive Name on page 67 Location Displays the physical location of the Switch For information about assigning a new location for the Switch see Specifying a Physical Location o...

Страница 57: ...ion Displays the version of Boot PROM software installed on the Switch Product Number Displays the 3Com product number of the unit TFTP Server optionally displayed Displays the IP address of the last TFTP server used to upgrade the unit s management software Filename optionally displayed Displays the name of the management software file that was used during the last software upgrade attempt Softwa...

Страница 58: ...Figure 9 The IP Setup page The IP Setup page contains the following elements IP Address Allows you to enter a unique IP address for the Switch For more information about IP addresses see Managing a Switch Over the Network on page 38 If you change the IP address of the Switch you can no longer access the web interface unless you enter the new IP address in the Location field of your browser Subnet ...

Страница 59: ...ust have the IP address 0 0 0 0 If the Switch has another IP address you must change the address to 0 0 0 0 and then reset the Switch The Switch only requests IP information from the BOOTP server 12 times If the Switch has not received the information by the 12th time you must reset the Switch and start again After BOOTP is enabled you need to power cycle the unit before BOOTP starts operating Con...

Страница 60: ...60 CHAPTER 3 WORKING WITH THE WEB INTERFACE Figure 10 The Port Setup page with auto negotiation enabled Figure 11 The Port Setup page with auto negotiation disabled ...

Страница 61: ...n is enabled on a 10BASE T port the duplex mode of the link is automatically detected and set accordingly If auto negotiation is disabled the speed and duplex mode of the port is set using the Speed Duplex listbox CAUTION The duplex mode of a link is not detected if the port on the other end of the link is not auto negotiating In this case the Switch port is set to operate in half duplex If you wa...

Страница 62: ...istbox allows you to Specify the speed and duplex mode of 10BASE T 100BASE TX ports HD indicates half duplex FD indicates full duplex Specify the duplex mode of 10BASE T and 100BASE FX ports If auto negotiation is enabled the listbox displays Auto and you cannot change the speed or duplex mode of the port manually CAUTION To communicate without errors both ends of a link must use the same duplex m...

Страница 63: ...or more information about IEEE 802 1p multicast filtering see Multicast Filtering on page 189 Untagged VLAN Allows you to specify a single VLAN to which the port belongs For more information about VLANs see Virtual LANs VLANs on page 163 If you want to move a port from the Default VLAN VLAN 1 to another VLAN that VLAN must have information defined for it If you select a VLAN in the Untagged VLAN l...

Страница 64: ...ags For more information about forwarding VLAN traffic that uses unknown tags see Forwarding Traffic Containing Unknown 802 1Q Tags on page 168 Port State Enabled Disabled Allows you to enable or disable the port that is turn the port on or off Security Enabled Disabled Allows you to specify whether the port uses security to guard against unauthorized users connecting devices to your network When ...

Страница 65: ...t has PACE enabled An endstation that does not support PACE or has PACE disabled VLT Tagging Enabled Disabled Allows you specify whether the port uses VLT Virtual LAN Trunk tagging By specifying that the ports at both ends of a link use VLT tagging you can create a VLT tagged link that carries traffic for all of the VLANs defined on your Switch For more information about VLT tagging see Placing a ...

Страница 66: ... enabled the settings of the FWD Unknown Tag listbox change see the FWD Unknown Tag listbox description on page 64 for more information For more information about IEEE 802 1Q VLAN learning see Using IEEE 802 1Q Learning on page 167 Configuring the Console Port By default the console port is configured for direct connection to a terminal You only need to change this configuration if you are connect...

Страница 67: ...r terminal or modem See the documentation accompanying your terminal or modem if you are unsure of the correct setting Changing the Management Settings for the Stack You can change the management settings for the stack using the Management Settings Pages These pages allow you to Specify a descriptive name for the stack Change your password Specify the physical location of the stack Access the Gett...

Страница 68: ... The name can be up to 20 characters long Changing Your Password You can change the password for your user using the Password Setting page To access the page 1 Click the Management Settings icon on the side bar 2 Click the Password Setting hotlink The Password Setting page is displayed as shown in Figure 14 Figure 14 The Password Setting page ...

Страница 69: ...ical location of the stack using the Location page To access the page 1 Click the Management Settings icon on the side bar 2 Click the Location hotlink The Location page is displayed as shown in Figure 15 Figure 15 The Location page Accessing the Getting Started Pages The Getting Started pages allow you to enter basic setup information for the stack To access the Getting Started pages 1 Click the ...

Страница 70: ... stack If the files are installed on your management workstation on the CD ROM or on a network server you must begin the file path with file If the files are stored on a Web server you must begin the URL with http If you do not know where the online help is stored see Installing Online Help and Documentation on page 34 Documentation Allows you to specify the URL or file path of the online document...

Страница 71: ...ack Set up resilient links for the stack Set up port trunks for the stack Configure VLANs for the stack Set up roving analysis ports for the stack Reset the Switch units in the stack Initialize the Switch units in the stack Upgrade the management software of the Switch units in the stack If an existing stack with STAP enabled is powered up with a new unit that has STAP disabled the setting of the ...

Страница 72: ... and which port should transmit the packet if it is to be forwarded The database contains a list of entries each containing three items The MAC Ethernet address information from each endstation that sends packets to the stack The port in the stack that receives packets from that endstation The Local ID of the VLAN to which the endstation belongs The number of addresses that the database can hold d...

Страница 73: ...conds all learned entries in the Switch Database become non ageing learned entries This means that they do not age but they are still removed from the database if the stack is reset or powered down For information about setting the ageing time see Configuring the Advanced Stack Settings on page 76 Permanent The entry has been placed into the Switch Database using the Switch Database page Permanent...

Страница 74: ...for a specific MAC address and the address is not in the database the Display Database Entries table displays the message Not in Database To display the entire list of entries for all units in the stack 1 From the Select Action Type listbox select Display All 2 Click the Apply button The entire list of entries is displayed 3 If there are more than 100 entries in the table click the Next Page butto...

Страница 75: ...e To delete an entry 1 In the Enter MAC Address field enter the MAC Ethernet address for the entry 2 From the Select Action Type listbox select Delete 3 Click the Apply button The Display Database Entries table displays the entry with the message Deleted If the entry contained a multicast address and the address is still stored against other ports or VLANs the table displays Deleted on Port The Di...

Страница 76: ...bled to support multimedia traffic For information on specifying whether individual ports use PACE see Configuring a Port on page 59 Forwarding Mode Fast Forward Fragment Free Store and Forward Intelligent Allows you to set the forwarding mode for units in the stack that belong to the Switch 1100 610 family Fast Forward Packets are forwarded as soon as the destination address is received and proce...

Страница 77: ...ode these units use the Store and Forward forwarding mode Spanning Tree Enabled Disabled Allows you to specify whether the stack uses the Spanning Tree Protocol STP Using STP makes your network more resilient to link failure and also provides a protection from loops one of the major causes of broadcast storms for more information see Spanning Tree Protocol on page 193 CAUTION If you enable STP the...

Страница 78: ...led For more information about FastIP see FastIP on page 181 CAUTION If you change the setting of the FastIP listbox the stack needs to be reset before the change comes into effect 802 1Q VLAN Learning Enabled Disabled Allows you to specify whether the ports in the stack use IEEE 802 1Q learning GVRP to place ports in VLANs automatically For more information about IEEE 802 1Q VLAN learning see Usi...

Страница 79: ...ised of a resilient link pair containing a main link and a standby link If the main link fails the standby link immediately and automatically takes over the task of the main link The resilient link pair is defined by specifying a main port and a standby port at one end of the link During normal operation the main port is enabled and the standby port is disabled If the main link fails the main port...

Страница 80: ...cannot be changed unless a link failure occurs Displaying Resilient Link Pairs The Resilient Links page displays the resilient link pairs that are set up for the stack Main Link Unit 1 Port 1 Unit 1 Port 2 Displays the port in the stack that is the main port of the resilient link pair and the state of the link on that port Standby Link Unit 1 Port 1 Unit 1 Port 2 Displays the port in the stack tha...

Страница 81: ...e allows you to delete a resilient link pair To do this 1 Click the resilient link pair 2 Click the Delete button Swapping the Active Port of a Resilient Link Pair The Resilient Links page allows you to swap the active or enabled port of a resilient link pair To do this 1 Click the resilient link pair 2 Click the Swap button Setting Up Port Trunks You can set up port trunks for the stack using the...

Страница 82: ... Port Trunks on page 157 Displaying the Ports that Belong to Each Port Trunk The Port Trunks Setup page allows you to display the ports that belong to each port trunk To do this 1 From the Port Trunks Available listbox select a port trunk 2 Click the Select button The Available Ports listbox displays the ports that are available to be placed in the port trunk The Trunk Members listbox displays the...

Страница 83: ...witch on page 158 To place a port back in the Available Ports listbox click the port in the Trunk Members listbox and click the Remove button The first primary port cannot be placed back in the Available Ports listbox until the other ports are placed back Configuring VLANs You can configure VLANs for the stack using the VLAN Setup page To access the page 1 Click the Configuration icon on the side ...

Страница 84: ...802 1Q ID is used to identify the VLAN if you use 802 1Q tagging across your network and can be any number between 2 and 4094 You only need to enter an ID in the 802 1Q VLAN ID field if you intend to use 802 1Q tagging on your network 4 In the Local ID listbox enter a local ID for the VLAN The local ID is used to identify the VLAN within the stack and can be any number between 2 and 16 VLAN 1 the ...

Страница 85: ...utton The Available Ports listbox displays the ports in the stack that are available to be placed in the VLAN The VLAN Members listbox displays the ports in the stack that belong to the VLAN Placing Ports in Single VLANs To place a port in a single VLAN use the Untagged VLAN listbox on the Port Setup page see Configuring a Port on page 59 Placing Ports in Multiple VLANs Using VLT Tagging To place ...

Страница 86: ...To remove an untagged port from a VLAN change its VLAN allocation using the Untagged VLAN listbox on the Port Setup page VLT tagged ports belong to all VLANs To remove a VLT tagged port from a VLAN specify that the port is no longer VLT tagged using the VLT Tagging listbox on the Port Setup page Setting Up Roving Analysis Ports You can set up roving analysis ports for the stack using the Roving An...

Страница 87: ...ent Defining Monitor Ports and Analysis Ports The Roving Analysis Setup page allows you to define monitor ports and analysis ports To define a monitor port and analysis port 1 Click a port in the Available Monitor Ports listbox to specify the monitor port 2 Click a port in the Available Analysis Ports listbox to specify the analysis port 3 Click Apply CAUTION The analysis port should have a higher...

Страница 88: ...o Remove all the Learned entries in the Switch Database SDB Reset the statistic counters of the stack CAUTION Resetting the stack causes some of the traffic being transmitted over the network to be lost It also clears all Learned entries from the Switch Database The stack takes about 10 seconds to reset While the stack is resetting you cannot communicate with it Initializing All the Units in the S...

Страница 89: ...ack network loops may occur if you have set up port trunks resilient links VLANs or the Spanning Tree Protocol Before initializing the stack ensure you have disconnected the cabling for all standby or duplicate links The stack takes about 10 seconds to initialize While the stack is initializing you cannot communicate with it Upgrading Management Software You can upgrade the management software of ...

Страница 90: ...site http www 3com com 3CServer can be installed and run on a Microsoft Windows 95 98 or NT system 2 Enter the name of the software upgrade file in the Filename field The filename format is s2sxx_yy bin where xx_yy is the version of management software CAUTION You must use the s2sxx_yy bin format otherwise the upgrade fails 3 Enter the IP address of the TFTP server in the Server Address field 4 Cl...

Страница 91: ...it Statistics You can display a range of statistics for all the ports on the Switch using the Unit Graph page To access the page 1 Click the Health icon on the side bar 2 Click the Unit Graph hotlink The Unit Graph page is displayed The graphs that can be displayed by the Unit Graph page are shown in Figure 25 Figure 25 The graphs displayed by the Unit Graph page You can choose to display graphs f...

Страница 92: ...r on the graph indicates that the ports are dealing with a normal traffic load A bandwidth utilization of 86 100 red bar on the graph indicates that the ports are dealing with a heavy traffic load This could be caused by a fault in your network or an inadequate network configuration The Total Errors graph scales automatically to display the total number of packets with errors that have been seen o...

Страница 93: ... graphs for Utilization Total Errors or Packet Size distribution To display the Utilization graph 1 From the first listbox choose a port 2 From the second listbox choose Utilization 3 Click Apply To display the Total Errors graph 1 From the first listbox choose a port 2 From the second listbox choose Total Errors 3 Click Apply ...

Страница 94: ...he port is dealing with a light traffic load A bandwidth utilization of 26 85 indicates that the port is dealing with a normal traffic load A bandwidth utilization of 86 100 indicates that the port is dealing with a heavy traffic load This could be caused by a fault in your network or an inadequate network configuration The Total Errors graph scales automatically to display the total number of pac...

Страница 95: ...playing and Changing Bridging VLANs Information Displaying and Changing Port Information Displaying and Changing System Feature Information Displaying and Changing IP related Information Displaying and Changing SNMP related Information Displaying and Changing Stack Information Throughout this chapter the term stack refers to a number of Switch units that are managed as a single unit However a stac...

Страница 96: ...If you are setting up the stack for management we suggest that you log in as admin which has no default password If you have logged on correctly the top level menu of the command line interface is displayed as described in About the Interface Menus on page 97 If you have not logged on correctly the message Incorrect password is displayed and the login sequence starts again To prevent unauthorized ...

Страница 97: ... level menu The command line interface is made up of two areas The Menu Area Contains the current menu of commands The menu can contain commands to configure the stack or commands to display other menus in the command line interface Each command is accompanied by a brief description of its purpose The Command Area Contains a Select menu option prompt where you can enter the commands displayed in t...

Страница 98: ... menu contains commands that allow you to view and change IP related information for the stack and ping other devices in your network It also allows you to reset the IP configuration back to factory defaults SNMP menu This menu contains commands that allow you to view and change SNMP related information for the stack System menu This menu contains commands that allow you to view and configure info...

Страница 99: ...structure Entering Commands The command area of the command line interface contains a Select menu option prompt that allows you to enter the commands in the menu area Commands are not case sensitive To enter a simple command At the prompt enter the name of the command ...

Страница 100: ...ues At each prompt the default value is displayed in brackets To enter abbreviated commands At the prompt enter enough characters to uniquely identify the commands For example to display the system menu and then change the password for your user enter sy pa password Displaying Menus There are several ways to display the menus in the command line interface menu structure To display sub menus At the...

Страница 101: ...Port list Lists all router ports for all units in the stack in ascending unit port number order whether manually configured or learned automatically bridge multicastFiltering routerPort removePort Removes a router port from any unit in the stack whether manually configured or learned automatically bridge port address add Adds a statically configured MAC address bridge port address find Finds a MAC...

Страница 102: ... VLAN name for a specified VLAN ID bridge vlan removePort Removes a single port from a VLAN bridge vlan summary Displays summary information about a VLAN specifically the port membership ethernet autoNegotiation Enables and disables auto negotiation for ports on the current Switch unit in the stack ethernet flowControl Enables and disables IEEE 802 3x flow control for ports on the current Switch u...

Страница 103: ...esilient link feature resilience swap Swaps over the active resilient link feature trunk addPort Adds a single port to a trunk feature trunk detail Displays detailed information about the trunks supported by the current Switch unit feature trunk removePort Removes a single port from a trunk on the current Switch unit feature trunk summary Displays summary information about all trunks ip interface ...

Страница 104: ... information Specifies administration details for the stack system initialize Initializes the Switch units in the stack system inventory Displays a list of the Switch units in the stack system module define Sets the IP configuration for a Switch Layer 3 or Switch ATM module system module display Displays the module configuration details system module mode Allows you to enable or disable an intelli...

Страница 105: ...ng Time You can set the bridge aging time on the Switch using the agingTime command on the Bridge menu To set the address aging time 1 At the Top level menu enter bridge agingTime The following prompt is displayed Enter new value in seconds 60 1000000 off 1800 2 Enter the new value for the aging timeout period If you select off aging will be turned off Displaying Bridge Information You can display...

Страница 106: ...ion It includes the bridge priority value and the MAC address of the lowest numbered port agingTime Displays the time out period in seconds for aging out dynamically learned forwarding information Designated Root Displays the root bridge identification It includes the root bridge s priority value and the MAC address of the lowest numbered port on that bridge bridgeMaxAge Displays the maximum age v...

Страница 107: ...that a bridge spends in the listening and learning states holdTime Displays the minimum delay time in seconds between sending topology change Bridge Notification Protocol Data Units BPDUs rootCost Displays the cost of the best path to the root from the root port of the bridge For example one determining factor of cost is the speed of the network interface that is the faster the speed the smaller t...

Страница 108: ... or disable Manually Identifying a Router Port You can manually identify router ports for all Switch units in the stack using the addPort command on the Router Port menu To manually define a router port 1 At the Top level menu enter bridge multicastFiltering routerPort addPort The following prompt is displayed Select unit for router port 1 4 1 2 Enter the number of unit for the router port The fol...

Страница 109: ...r automatically learned by IGMP Snooping To remove a router port 1 At the Top level menu enter bridge multicastFiltering routerPort removePort The following prompt is displayed Select unit for router port 1 2 4 The list in the prompt only includes the units in the stack that have router ports on them 2 Enter the number of unit for the router port that you wish to remove The following prompt is dis...

Страница 110: ...d bytes for example 08 00 02 06 03 bd The following prompt is displayed Enter the VLAN ID for this address 1 4094 1 4 Enter the VLAN ID for the newly assigned address Finding a MAC Address You can find a MAC address within the address databases on all Switch units within the stack using the find command on the Address menu To find a port MAC address 1 At the Top level menu enter bridge port addres...

Страница 111: ...ou can remove a MAC address associated with a selected port using the remove command on the Address menu To remove a MAC address 1 At the Top level menu enter bridge port address remove The following prompt is displayed Enter the address to be removed 2 Enter the address that you wish to remove The address must be entered in the form of hyphen separated bytes for example 08 00 02 06 03 bd The foll...

Страница 112: ...he following prompt is displayed Select bridge port 1 12 2 Enter the number of the port The following prompt is displayed Enter new value 1 65535 10 3 Enter the new value for the spanning tree path cost on the port Enabling and Disabling Spanning Tree Fast Start You can enable or disable spanning tree fast start on a port of the current Switch unit using the stpFastStart command on the Port menu T...

Страница 113: ...lowing prompt is displayed Select bridge port 1 12 all all 2 Enter the number of a port on the Switch unit or all The port summary information for the Switch is displayed as shown in the example below The following port summary information is displayed State Displays the parameters that provide the state of the port the possible values are Disabled port is disabled Link Down port is enabled but li...

Страница 114: ...he vltMode command on the Port menu To enable or disable VLT tagging on a port 1 At the Top level menu enter bridge port vltMode The following prompt is displayed Select bridge ports 1 12 1 2 Enter the number of the port to have VLT tagging enabled or disabled The following prompt is displayed Enter new value disable enable disable 3 Enter enable or disable Setting the Bridge Spanning Tree Forward...

Страница 115: ...ter of the current Switch using the stpMaxAge command on the Bridge menu To set the bridge spanning tree maximum age 1 At the Top level menu enter bridge stpMaxAge The following prompt is displayed Enter new value in seconds 6 40 20 2 Enter the new value for the maximum age Setting the Spanning Tree Bridge Priority You can set the spanning tree bridge priority of the current Switch using the stpPr...

Страница 116: ...t Switch unit to the selected VLAN using the addPort command on the VLAN menu To add a port to a VLAN 1 At the Top level menu enter bridge vlan addPort The following prompt is displayed Select VLAN ID 1 4094 1 2 Enter the number of the VLAN ID that you wish to add a port to The following prompt is displayed Enter port 1 12 all 3 Enter the port number to be added to the VLAN or enter all for all po...

Страница 117: ...aximum of 32 characters including spaces The default VLAN name is VLAN x where x is the VLAN ID Deleting a VLAN You can delete a VLAN using the delete command on the VLAN menu To delete a VLAN 1 At the Top level menu enter bridge vlan delete The following prompt is displayed Select VLAN ID 2 4094 2 Enter the VLAN ID that you wish to delete If the VLAN contains member ports a warning message is dis...

Страница 118: ...stack is required Modifying a VLAN You can modify the VLAN name for a specified VLAN ID using the modify command on the VLAN menu To modify a VLAN name 1 At the Top level menu enter bridge vlan modify The following prompt is displayed Select VLAN ID 1 4094 1 2 Enter the VLAN ID that you wish to modify The following prompt is displayed Enter VLAN Name VLAN 3 3 Enter the new VLAN name The default op...

Страница 119: ...current Switch unit to be removed The choice of port numbers reflects the number of ports on the current Switch unit An error message is displayed if there are no ports within the selected VLAN Displaying Summary VLAN Information You can display summary information about a single VLAN or all VLANs present in the stack specifically port membership using the summary command on the VLAN menu To displ...

Страница 120: ...on the Switch Display summary information about Ethernet ports on the Switch To display and change information about the ports on another Switch unit in the stack you need to select that unit using the unit command For more information see Moving the Focus of the Command Line Interface on page 141 Enabling and Disabling Ports You can enable and disable Ethernet ports on the Switch using the portSt...

Страница 121: ...10half 10full If you specify all a prompt is displayed indicating all the values possible for all the ports on the Switch 3 Enter the new speed and duplex mode If you are specifying the speed and duplex mode of all the ports only the ports which can support the new speed and duplex mode are changed CAUTION To communicate without errors both ends of a link must use the same duplex mode Port speeds ...

Страница 122: ...net ports on the Switch using the autoNegotiation command on the Ethernet menu To enable or disable auto negotiation for a port 1 At the Top level menu enter ethernet autoNegotiation The following prompt is displayed Select Ethernet port 1 24 all 2 Enter the number of the port to have auto negotiation enabled or disabled or enter all for all ports The following prompt is displayed Enter new value ...

Страница 123: ...w control enabled or disabled or enter all for all the ports The following prompt is displayed Enter new value on off off 3 Enter on or off If you are enabling or disabling IEEE 802 3x flow control for all the ports only the ports which can support IEEE 802 3x flow control are changed For IEEE 802 3x flow control to operate correctly it must be enabled at both ends of the link Displaying Port Stat...

Страница 124: ...dundancy Check CRC but excludes the preamble Start of Frame Delimiter Fragments Displays the number of incomplete packets that have been received by the port that is the number of packets that Did not contain a whole number of octets or had a bad Frame Check Sequence FCS Contained less than 64 octets including FCS octets but excluding the preamble Start of Frame Delimiter Port 1 Port Speed 10Mbps ...

Страница 125: ...umber of packets seen by the port that contained a CRC error or an alignment error A CRC error occurs if a packet of legal length has an invalid CRC but does not have a framing error An alignment error occurs if a packet has a CRC error and does not contain a whole number of octets CRC and alignment errors may be caused by faults in transmitting devices Change the Network Interface Card NIC of the...

Страница 126: ...and on the Ethernet menu To display the port summary information 1 At the Top level menu enter ethernet summary The following prompt is displayed Select Ethernet port 1 24 all 2 Enter the number of a port or enter all for all the ports The port summary information for the port s is displayed An example of the port summary information is shown below The statistics that are displayed are gathered in...

Страница 127: ...f it is already part of a resilient link or a member of a trunk To set up a roving analysis port 1 At the Top level menu enter feature analyzer add The following prompt is displayed Select analysis unit 1 4 2 Enter the number of the Switch unit in the stack on which you wish the roving analysis port to reside The following prompt is displayed Enter analysis port 3 6 3 Enter the port number that yo...

Страница 128: ...the stack using the start command on the Analyzer menu To start monitoring data on a port 1 At the Top level menu enter feature analyzer start The following prompt is displayed Select unit to monitor 1 4 2 Enter the number of the Switch unit in the stack on which you wish the monitor port to reside The following prompt is displayed Enter port to monitor 1 2 7 3 Enter the port number that you wish ...

Страница 129: ...broadcastStormControl command on the Feature menu To enable or disable broadcast storm control for the Switch 1 At the Top level menu enter feature broadcastStormControl The following prompt is displayed Enter new value disable enable disable 2 Enter enable or disable If you enter enable the following prompt is displayed Enter rising threshold in pps 0 200000 2976 3 Enter the value for the rising ...

Страница 130: ...or standby link 1 4 4 Enter the number of the unit for the standby link that you wish to define The following prompt is displayed Select port for the standby link 3 6 5 Enter the number of the port for the standby link that you wish to define Displaying Resilient Link Information You can display detailed information for all resilient links set up within the stack using the detail command on the Re...

Страница 131: ...hin the stack to redesignate the active link by using the swap command on the Resilience menu To swap over the active link 1 At the Top level menu enter feature resilience swap The following prompt is displayed Select resilient link index 1 2 2 Enter the resilient link index number for the resilient link that you wish to become active Adding a Port to a Trunk You can add a single port to a trunk o...

Страница 132: ... menu enter feature trunk detail The following prompt is displayed Select Trunk Index 1 2 2 Enter the index number of the trunk for which you wish to see detailed information 3 The detailed trunk information is displayed as shown in the example below Removing a Port from a Trunk You can remove a single port from a trunk using the removePort command on the Trunk menu To remove a port from a trunk 1...

Страница 133: ...for the Switch Specify whether the Switch uses BOOTP Ping other devices on your network To display and change IP related information for another Switch unit in the stack you need to select that unit using the unit command For more information see Moving the Focus of the Command Line Interface on page 141 Specifying IP and SLIP Information You can specify IP and SLIP information for the current Swi...

Страница 134: ...IP address of the default router in your network Enter default gateway 0 0 0 0 4 If your network contains a router enter the IP address The following prompt is displayed Enter SLIP address 192 168 101 1 If you want to manage the stack using the web interface through the console port of the Switch you need to set up Serial Line Interface Protocol SLIP information for the Switch A SLIP address is si...

Страница 135: ...or the Switch units in the stack automatically You can specify whether the Switch uses BOOTP by using the bootp command on the IP Interface menu To specify that the Switch uses BOOTP 1 At the Top level menu enter ip interface bootp The following prompt is displayed Enter new value enable disable enable 2 Enter enable to specify that the Switch uses BOOTP or disable to specify that it does not In o...

Страница 136: ...le PING request to the specified device and a message similar to the following is displayed Starting ping resolution of displayed time is 10 milli sec If the device is accessible and functioning correctly a message similar to the following is displayed response from 191 128 40 121 3 router hops time 10ms If the device is not accessible or is not functioning correctly a message similar to the follo...

Страница 137: ...ty strings for the users defined on the stack using the community command on the SNMP menu By default all users have a community string that is identical to the user name For example the community string for the user monitor is monitor To specify the SNMP community strings 1 At the Top level menu enter snmp community The following prompt is displayed Enter new community for user user 2 Enter the c...

Страница 138: ...ow Modifying Trap Destination Details You can modify the community string and IP address of a current trap destination device using the modify command on the SNMP Trap menu To modify trap destination details 1 At the Top level menu enter snmp trap modify The following prompt is displayed Select trap index 1 2 3 2 Enter the index number of the trap destination device to be modified The following pr...

Страница 139: ...vice You can perform an SNMP GET command on the stack using the get command on the SNMP menu To perform an SNMP GET command on the stack 1 At the Top level menu enter snmp get The following prompt is displayed Enter object identifier 2 Enter the identifier of the SNMP object The following prompt is displayed Enter type phys ip gauge cnt num str str 3 Enter the data type of the SNMP object The valu...

Страница 140: ... SNMP objects in a network device You can perform an SNMP SET command on the stack using the set command on the SNMP menu CAUTION You should not modify the values of SNMP objects unless you have considerable knowledge and experience with SNMP To perform an SNMP SET command on the stack 1 At the Top level menu enter snmp set The following prompt is displayed Enter object identifier 2 Enter the iden...

Страница 141: ... the stack Display and modify the access rights for the access levels in the stack Enable and disable all forms of remote access to the stack Reset the Switch units in the stack Initialize the Switch units in the stack Upgrade the management software of the Switch units in the stack Configure intelligent modules in the stack Moving the Focus of the Command Line Interface Many commands in the comma...

Страница 142: ...ious Switch unit in the stack using the logout command on the System menu Specifying Stack Administration Details You can specify administration details system name contact name and physical location for the stack using the information command on the System menu To specify the administration details 1 From the Top level menu enter system information The following prompt is displayed Enter system n...

Страница 143: ... only fields are displayed System Name Displays the descriptive name or system name for the unit For information about assigning a new name see Specifying Stack Administration Details on page 142 Location Displays the physical location of the unit For information about assigning a new location see Specifying Stack Administration Details on page 142 Contact Displays the details of a person to conta...

Страница 144: ...sion Displays the version of Boot PROM software installed on the unit MAC Address Displays the MAC Ethernet address of the unit Product Number Displays the 3Com product number of the unit Serial Number Displays the serial number of the unit TFTP Server optionally displayed Displays the IP address of the last TFTP server used to upgrade the unit s management software Filename optionally displayed D...

Страница 145: ... other unit is unit 2 If the stack contains a number of units connected using a Matrix Module the unit numbers are defined by the port connections on the Module Description Displays the product name of the unit Unit Name Displays the descriptive name or system name for the unit For information about assigning a new name see Specifying a Descriptive Name on page 67 State Displays the current operat...

Страница 146: ...splayed Enter subnet mask xxx xxx xxx xxx 3 Enter the subnet mask for the module The following prompt is displayed Enter default router 0 0 0 0 4 Enter the default router for the module The new addresses are displayed before exiting Displaying Module Configuration You can display the configuration of a module using the display command on the System Module menu At the top level menu enter system mo...

Страница 147: ...the current user Enter new password 3 Enter the new password Passwords must only contain alpha numeric characters The following prompt is displayed allowing you to re enter the new password as conformation Retype password A message is displayed informing you that the password has been successfully changed Specifying User Details You can specify user details for the stack using the define command o...

Страница 148: ... can display the user details for the stack using the display command on the System Security User menu To display the user details for the stack From the Top level menu enter system security user display The user details are displayed An example of the details is shown below Modifying User Details You can modify user details for the stack using the modify command on the System Security User menu T...

Страница 149: ...the Top level menu enter system security user remove The following prompt is displayed Enter the user name users all 2 Enter the name of the user that is to have its details removed or enter all to remove the details of all users except default users Displaying Access Rights You can display the access rights for all access levels in the stack using the display command on the System Security Access...

Страница 150: ...ue for console enable disable enable 4 Enter enable if the access level allows management through a console port of the stack or disable if it does not The following prompt is displayed Enter new value for telnet enable disable enable 5 Enter enable if the access level allows telnet management or disable if it does not The following prompt is displayed Enter new value for web enable disable enable...

Страница 151: ...e disable enable 3 Enter enable or disable as required Resetting All the Units in the Stack You can reset all the Switch units in the stack using the reset command on the System menu To reset the units 1 At the Top level menu enter system reset The following prompt is displayed Are you sure you want to reset the system y n y 2 Enter y if you wish to proceed or n if you want to stop the reset What ...

Страница 152: ...urns them to their default factory settings The only information that does not return to its default setting is the IP and SLIP information which is retained to ensure that you can continue managing the stack You may want to initialize the stack if it has previously been used in a different part of your network and its settings are incorrect for the new environment CAUTION Use great care when init...

Страница 153: ...icrosoft Windows 95 98 or NT system 2 From the Top level menu enter system softwareUpgrade The following prompt is displayed TFTP Server Address 0 0 0 0 3 Enter the IP address of the TFTP server that holds the software upgrade file The file must be stored somewhere that is accessible to the TFTP load request Contact your system administrator if you are unsure where to place the image file The foll...

Страница 154: ...154 CHAPTER 4 WORKING WITH THE COMMAND LINE INTERFACE ...

Страница 155: ...III MANAGEMENT REFERENCE Chapter 5 Port Trunks Chapter 6 Virtual LANs VLANs Chapter 7 FastIP Chapter 8 Multicast Filtering Chapter 9 Spanning Tree Protocol Chapter 10 RMON ...

Страница 156: ......

Страница 157: ...to communicate using up to four links in parallel This chapter explains more about port trunks and how to set them up on your network It covers the following topics What are Port Trunks Port Trunks and Your Switch Placing Ports in a Port Trunk Port Trunk Example ...

Страница 158: ... a Switch 3300 and a Switch 630 connected using a port trunk with four links If all ports on both Switch units are configured as 100BASE TX and they are operating in full duplex the potential bandwidth of the connection is 800Mbps Figure 30 Switch units connected using a port trunk Port Trunks and Your Switch Each unit in the Switch 1100 3300 family supports two port trunks and if you have a stack...

Страница 159: ...inks on page 79 For information about roving analysis see Setting Up Roving Analysis Ports on page 86 Port trunks cannot have a permanent entry placed against them in the Switch Database When using a port trunk note that To gather statistics about a port trunk you must add together the statistics for each port in the trunk To disable a link in a port trunk you must remove the connection and then d...

Страница 160: ...An 800Mbps port trunk between two Switch units To set up this configuration 1 Prepare ports 13 15 17 and 19 on the higher Switch for port trunking a Use the web interface to ensure that the ports have an identical configuration b Use the Port Trunk Setup page of the web interface to specify that ports 13 15 17 and 19 are ports of the port trunk ...

Страница 161: ... Port Trunk Setup page of the web interface to specify that ports 1 3 5 and 7 are ports of the port trunk 3 Connect port 13 on the higher Switch to port 1 on the lower Switch 4 Connect port 15 on the higher Switch to port 3 on the lower Switch 5 Connect port 17 on the higher Switch to port 5 on the lower Switch 6 Connect port 19 on the higher Switch to port 7 on the lower Switch ...

Страница 162: ...162 CHAPTER 5 PORT TRUNKS ...

Страница 163: ...ired by many network administration tasks and increases the efficiency of your network This chapter explains more about the concept of VLANs and explains how they can be implemented on your Switch It covers the following topics What are VLANs Benefits of VLANs VLANs and Your Switch VLAN Configuration for Beginners ...

Страница 164: ...le than any traditional network Using VLANs also provides you with three other benefits It eases the change and movement of devices on IP networks With traditional IP networks network administrators spend much of their time dealing with moves and changes If users move to a different IP subnet the IP addresses of each endstation must be updated manually With a VLAN setup if an endstation in VLAN 1 ...

Страница 165: ...formation about each VLAN on your Switch before the Switch can use it to forward traffic VLAN Name This is a descriptive name for the VLAN for example Marketing or Management 802 1Q VLAN ID This is used to identify the VLAN if you use 802 1Q tagging across your network Local ID This is used to identify the VLAN within the Switch and corresponds to the VLAN IDs used in legacy 3Com devices Support f...

Страница 166: ...iple VLANs across a single physical backbone link each packet must be tagged with a VLAN identifier so that the switches can identify which packets belong in which VLANs Routers interconnect VLANs so they must also understand 802 1Q tagging so that they do not become bottlenecks for inter VLAN traffic Placing a Port in a Single VLAN Once the information for a new VLAN has been defined you can plac...

Страница 167: ...link 1 Specify that the port is a VLT port using the VLT listbox on the Port Setup page of the web interface see Configuring a Port on page 59 2 Specify that the port at the other end of the link is a VLT port You cannot create a VLT tagged link with ports that already use 802 1Q tagging A VLT tagged link only carries traffic for VLANs defined on your Switch In legacy 3Com devices a VLT tagged lin...

Страница 168: ...ur Switch see Configuring a Port on page 59 For information about enabling 802 1Q learning for a whole Switch or stack see Configuring the Advanced Stack Settings on page 76 For information about configuring IEEE 802 1Q functionality on an endstation refer to the user documentation supplied with your endstation or the endstation s Network Interface Card NIC Forwarding Traffic Containing Unknown 80...

Страница 169: ...VLANs and Your Switch 169 Figure 32 Forwarding unknown 802 1Q tags ...

Страница 170: ...e legacy Switch units on your Switch it only forwards traffic for legacy VLANs that are defined When defining the VLANs the Local ID on your Switch corresponds to the VLAN ID on the legacy Switch units If your legacy Switch units use multiple VLANs all connections between your Switch and the legacy Switch units must use VLT tagging If your legacy Switch units use a single VLAN the connections betw...

Страница 171: ...lest VLAN operates in a small network using a single switch In this network there is no requirement to pass VLAN traffic across a link All traffic is handled by the single switch and therefore untagged connections can be used The example shown in Figure 33 illustrates a single Switch 1100 connected to endstations and servers using untagged connections Ports 1 3 and 13 of the Switch belong to VLAN ...

Страница 172: ... setup page of the web interface to check VLAN 1 and VLAN 2 The relevant ports should be listed in the VLAN Members listbox Simple Example Untagged Connections with Hubs In a slightly larger network the switch port may be connected to a hub rather than a single endstation to provide more connections to the VLAN You can still use untagged connections as data is not being passed between switches and...

Страница 173: ...VLAN Configuration for Beginners 173 Figure 34 Simple example Untagged connections using hubs ...

Страница 174: ...levant ports should be listed in the VLAN Members listbox 4 Connect VLAN 1 and VLAN 2 Configure the Layer 3 Module to allow communication between VLANs 1 and 2 For more information refer to the user documentation supplied with the Layer 3 Module 5 Join the switch and hub Connect port 13 of the Dual Speed Hub 500 to port 1 of the Switch 3300 Simple Example 802 1Q Tagged Connections In a network wit...

Страница 175: ...ine VLAN 2 VLAN 1 is the default VLAN and already exists Do not add the ports to the VLAN using this screen For more information about creating a VLAN see Configuring VLANs on page 83 2 Add untagged ports on Switch 1 Use the Untagged VLAN listbox on the Port Setup page of the web interface to place untagged ports in the appropriate VLAN For more information about editing the port setup see Configu...

Страница 176: ... Port Setup page of the web interface to place untagged ports in the appropriate VLAN For more information about editing the port setup see Configuring a Port on page 59 6 Add tagged port 25 on Switch 2 Use the VLAN Setup page of the web interface to assign port 25 on Switch 2 to both VLANs 1 and 2 so that all VLAN traffic is passed over the link 7 Check the VLAN membership for both switches Retur...

Страница 177: ...e shown in Figure 36 shows a network that has endstations that support IEEE 802 1Q and network devices that have 802 1Q learning enabled The 802 1Q functionality of each endstation informs the network that it is to receive traffic for certain VLANs and the network devices automatically place the endstation in those VLANs In addition the links between the network devices are automatically configure...

Страница 178: ... supplied with the Layer 3 Module 7 Connect port 26 of the left Switch 1100 to port 1 of the Switch 3300 8 Connect port 25 of the right Switch 1100 to port 3 of the Switch 3300 Connecting to a Legacy Network The example shown in Figure 37 illustrates a Switch 1100 that has been connected to a legacy network using a VLT tagged link The legacy network supports two VLANs VLANs 1 and 2 and these can c...

Страница 179: ... 802 1Q tagging c Use the Port Setup page of the web interface to specify that port 26 uses VLT tagging 2 Connect port 26 on the Switch 1100 to port 1 on the Switch 3000 10 100 Figure 37 Connecting to legacy VLANs using VLTs To configure the Switch 1000 Switch 3000 10 100 and router refer to the user documentation supplied with them ...

Страница 180: ...180 CHAPTER 6 VIRTUAL LANS VLANS ...

Страница 181: ...hen VLANs are implemented on your network This chapter explains more about the concept of FastIP and how it is enabled on your Switch It covers the following topics What is FastIP How FastIP Works An Example FastIP and the Switch Database Enabling FastIP ...

Страница 182: ...ch Database for all VLANs the SuperStack II Switch 1000 Switch 3000 and Desktop Switch units use this system For more information about shared Switch Databases see FastIP and the Switch Database on page 186 All your endstations support FastIP For more information refer to the user documentation supplied with your endstations or the Network Interface Card NIC of your endstations How FastIP Works Fa...

Страница 183: ...of the endstation B An Example Figure 38 overleaf shows a network containing two endstations three Switch units and a routing device Endstation A is in VLAN 1 and endstation B is in VLAN 2 In this setup FastIP is not enabled and if endstation A sends data packets to endstation B they must pass through the routing device If FastIP is enabled on the Switch units and endstations 1 Endstation A sends ...

Страница 184: ...184 CHAPTER 7 FASTIP Figure 38 Network without FastIP Figure 39 Endstation A sends an NHRP packet to endstation B ...

Страница 185: ...An Example 185 Figure 40 Endstation B sends an NHRP packet to endstation A Figure 41 Endstation A sends data packets to endstation B ...

Страница 186: ...AN can be stored against different ports As an example Figure 42 illustrates the Switch Database storing an entry for endstation A in VLANs 1 2 and 3 and the entries are all stored against port 1 Figure 42 Entry stored in multiple VLANs Figure 43 illustrates the Switch Database storing an entry for endstation A in VLANs 1 2 and 3 here the VLAN 1 entry is in port 1 the VLAN 2 entry is in port 2 and...

Страница 187: ... can store an entry for a device in several VLANs at the same time but the entries can only be stored against one port This means that you cannot use non routable protocols on your network Enabling FastIP To enable FastIP on your Switch or stack 1 From the web interface click the Configuration icon on the side bar 2 Click the Advanced Stack Setup hotlink The Advanced Stack Setup page is displayed ...

Страница 188: ...188 CHAPTER 7 FASTIP ...

Страница 189: ...ance of networks that carry multicast traffic This chapter explains multicasts multicast filtering and how multicast filtering can be implemented on your Switch It covers the following topics What is a Multicast What is Multicast Filtering Multicast Filtering and Your Switch ...

Страница 190: ...sent to several endstations simultaneously but where broadcasting that traffic to all endstations would seriously reduce network performance What is Multicast Filtering Multicasts are similar to broadcasts by default they are sent to all endstations on a LAN or VLAN Multicast filtering is the system by which endstations only receive multicast traffic if they register to join specific multicast gro...

Страница 191: ...ion wants to receive traffic for a multicast group it sends out a join packet with a known multicast address to declare that it would like to join that group 2 When the join packet arrives at a port on a Switch with 802 1p multicast learning enabled the Switch specifies that the port is to forward traffic for the multicast group and then sends a similar packet to all other ports 3 When traffic for...

Страница 192: ...tation would like to join 3 When the report packet arrives at a port on a Switch with IGMP multicast learning enabled the Switch specifies that the port is to forward traffic for the multicast group and then forwards the packet to the router 4 When the router receives the report packet it registers that the LAN or VLAN requires traffic for the multicast groups 5 When the router forwards traffic fo...

Страница 193: ...plains more about the protocol and the protocol features supported by your Switch It covers the following topics What is STP How STP Works Using STP on a Network with Multiple VLANs Connecting to STP Systems on Legacy Switch Units Enabling STP The protocol is a part of the 802 1D bridge specification defined by the IEEE Computer Society To explain STP more effectively your Switch will be defined a...

Страница 194: ...ining three LAN segments separated by three bridges With this configuration each segment can communicate with the others using two paths Without STP this configuration creates loops that cause the network to overload however STP allows you to have this configuration because it detects duplicate paths and prevents or blocks one of them from forwarding traffic Figure 46 shows the result of enabling ...

Страница 195: ...ment and a specifically assigned reference point on the network Once the most efficient path has been determined all other paths are disabled Thus in the example above STP initially decided that the path through Bridge C was the most efficient and so blocked the path through Bridge B After the failure of Bridge C STP re evaluated the situation and opened the path through Bridge B ...

Страница 196: ...idge The default priority of your Switch is 32768 Each port to have a cost This specifies the efficiency of each link usually determined by the bandwidth of the link the higher the cost the less efficient the link Table 9 shows the default port costs for your Switch CAUTION If you are using STP on a network that contains various network devices ensure that the cost for each port type is the same f...

Страница 197: ...ed Bridge The port on this bridge that connects to the segment is called the Designated Bridge Port STP Configuration After all the bridges on the network have agreed on the identity of the Root Bridge and have established the other relevant parameters each bridge is configured to forward traffic only between its Root Port and the Designated Bridge Ports for the respective network segments All oth...

Страница 198: ...8 CHAPTER 9 SPANNING TREE PROTOCOL An Example Figure 48 shows a LAN that has STP enabled The LAN has three segments and each segment is connected using two possible links Figure 48 Port costs in a network ...

Страница 199: ...costs 300 C B 200 B A 100 Port 2 on Bridge C is therefore selected as the Designated Bridge Port for segment C STP Configurations Figure 49 overleaf shows three possible STP configurations using SuperStack II Switch units Configuration 1 Redundancy for Backbone Link In this configuration a Switch 1100 and a Switch 3300 both have STP enabled and are connected by two links STP discovers a duplicate ...

Страница 200: ...200 CHAPTER 9 SPANNING TREE PROTOCOL Figure 49 STP configurations ...

Страница 201: ...has a path cost of 100 and is automatically blocked because the other Switch to Switch connections have a path cost of 36 18 18 This means that both VLANs are now subdivided VLAN 1 on Switch units A and B cannot communicate with VLAN 1 on Switch C and VLAN 2 on Switch units A and C cannot communicate with VLAN 2 on Switch B Figure 50 Configuration that separates VLANs To avoid any VLAN subdivision...

Страница 202: ...f your Switch and the STP system of the legacy Switch units are completely separate This means that if you connect your Switch to a legacy Switch unit using multiple VLT links a loop may created Some legacy units cannot use VLAN 16 if they are using STP If your Switch is connected to one of these units VLAN 16 traffic is blocked on the port Enabling STP To enable STP on your Switch via the command...

Страница 203: ...ork This chapter explains more about the RMON concept and the RMON features supported by the Switch It covers the following topics What is RMON Benefits of RMON RMON and Your Switch You can only use the RMON features of the Switch if you have an RMON management application such as the RMON application supplied with 3Com Transcend Enterprise Manager software ...

Страница 204: ...oups of Ethernet RMON statistics This section describes these groups and details how they can be used Statistics The Statistics group provides traffic and error statistics showing packets bytes broadcasts multicasts and errors on a LAN segment or VLAN Information from the Statistics group is used to detect changes in traffic and error patterns in critical areas of your network History The History ...

Страница 205: ...ctets and error packets between the hosts The conversation matrix helps you to examine network statistics in more detail to discover for example who is talking to whom or if a particular PC is producing more errors when communicating with its file server Combined with Hosts Top N this allows you to view the busiest hosts and their primary conversation partners Events The Events group provides you ...

Страница 206: ...ct users In addition probes record the behavior of your network so that you can analyze the causes of problems It reduces the load on the network and the management workstation Traditional network management involves a management workstation polling network devices at regular intervals to gather statistics and identify problems or trends As network sizes and traffic levels grow this approach place...

Страница 207: ...provide the data for the unit and port graphs of the web interface 30 second intervals 10 historical samples stored 30 minute intervals 10 historical samples stored Alarms Although up to 200 alarms can be defined for the Switch a new or initialized Switch has two alarms defined for each port Broadcast bandwidth used Percentage of errors over one minute You can modify these alarms using an RMON man...

Страница 208: ...e alarms are given in Table 12 Table 11 Alarm Events Event Action No action Notify only Send Trap Notify and filter port Send Trap Block broadcast and multicast traffic on the port Recovers with the unfilter port event Notify and disable port Send Trap Turn port off Notify and enable port Send Trap Turn port on Disable port Turn port off Enable port Turn port on Notify and switch resilient port Se...

Страница 209: ...umber Timestamp User ID Item ID including qualifier New value of item There is a limit of 16 records on the number of changes stored The oldest records are overwritten first Table 12 Values for the default alarms Statistic High Threshold Low Threshold Recovery Period Broadcast bandwidth used Value 20 Action Notify and filter Value 10 Action Notify and unfilter 20 secs Percentage of errors over one...

Страница 210: ...210 CHAPTER 10 RMON ...

Страница 211: ...IV PROBLEM SOLVING Chapter 11 Problem Solving ...

Страница 212: ......

Страница 213: ...erface Problems Solving Command Line Interface Problems Solving SNMP Management Software Problems Solving Serial Web Utility Problems Solving Management Software Upgrade Utility Problems Solving Other Problems If you have a problem that is not listed here and you cannot solve it please contact your local technical support representative ...

Страница 214: ...e Switch has not been disabled For more information see Enabling and Disabling Remote Access on page 150 The port through which you are trying to access the Switch has not been disabled For more information see Displaying the Status of the Ports on page 54 or if it is enabled check the connections and network cabling for the port The port through which you are trying to manage the Switch has not b...

Страница 215: ... the Unit icon are not displayed in the order that they are stacked If you have a stack of two units connected back to back the unit with the lowest MAC address is displayed at the bottom of the Unit icon If you have a stack of up to four units connected using a Matrix Module the order of units in the Unit icon follows the ports on the Matrix Module the unit connected to the Unit 1 port is display...

Страница 216: ...witch needs to be sent back to your supplier so that it can be returned to 3Com A management software upgrade has failed and you can no longer manage the Switch using the web interface Try accessing the command line interface and upgrading the Switch again If that is not possible use the Management Software Upgrade Utility to upgrade it through the console port For more information about the Manag...

Страница 217: ...initialize the Switch For more information see Initializing All the Units in the Stack on page 88 or page 151 The terminal or terminal emulator can no longer access the Switch over the network Check that Remote access to the management software of the Switch has not been disabled For more information see Enabling and Disabling Remote Access on page 150 The port through which you are trying to acce...

Страница 218: ...tility see Using the Upgrade Utility on page 231 If the Switch is stacked separate each Switch from the stack and use the Management Software Upgrade Utility to upgrade each Switch individually Solving SNMP Management Software Problems The SNMP Network Management Software cannot access the Switch Check that The IP information for the Switch is correctly configured See Setting Up IP Information on ...

Страница 219: ...ons and network cabling for the port The port through which you are trying to manage the Switch has not been moved from the Default VLAN VLAN 1 This is the only VLAN that can be used to access the management software of the Switch If there is still a problem try accessing the Switch through a different port If you can now access the Switch a problem may have occurred with the original port Contact...

Страница 220: ...rn The null modem cable is not connected to the console port of the Switch The null modem cable is not connected to the serial port of the PC or the serial port being used is not the same as the serial port specified in the upgrade command The Switch is not being powered down and up as directed Retry the command ensuring that you follow all the steps An error occurs when the utility attempts to op...

Страница 221: ...age 59 You have added the Switch to an already busy network and response times and traffic levels have increased You may have added a group of users to one of the Switch ports via a hub and not disabled half duplex flow control for the port Disable half duplex flow control for all ports that are operating in half duplex and are connected to multiple devices using a hub Disabling half duplex flow c...

Страница 222: ...emaining VLANs You have connected a Switch to a device using an 802 1Q tagged link and you can no longer access the management software of the device or the devices connected to that device You may have connected to a device that only supports 802 1Q tagged links and have not specified that VLAN 1 traffic uses 802 1Q tagging Specify that VLAN 1 traffic is 802 1Q tagged and try accessing the device...

Страница 223: ...ils to upgrade Take the following steps 1 Ensure that the unit has The IP address 0 0 0 0 or A valid IP address that is in the same subnet as the TFTP server 2 If the unit has the IP address 0 0 0 0 ensure that the stack has a valid IP address that is in the same subnet as the TFTP server 3 Attempt the upgrade again ...

Страница 224: ...224 CHAPTER 11 PROBLEM SOLVING ...

Страница 225: ...V APPENDICES AND INDEX Chapter A Serial Web Utility Chapter B Management Software Upgrade Utility ...

Страница 226: ......

Страница 227: ...the Serial Line Interface Protocol SLIP If you have any problems accessing the Web interface using the Serial Web Utility see Solving Serial Web Utility Problems on page 219 Installing the Serial Web Utility The Serial Web Utility can be installed on to a management workstation that already has 3Com Transcend management applications installed on it By default the Serial Web Utility is installed in...

Страница 228: ...that the Serial Web Utility uses when it is running These default settings are already correct for connection to the Switch so you should not need to change them Connection name Allows you to enter a name for the connection Modem name Allows you to enter a name for the modem connection PC SLIP Address Displays the SLIP address that is to be allocated to the management workstation The default addre...

Страница 229: ...o view and change some of the settings the Serial Web Utility uses when it is running License agreement Using the Serial Web Utility Every time you want to access the Web interface through a serial link make your management connection see Setting Up Web Interface Management on page 33 and use the Serial Web Utility to set up your connection 1 Either Double click on the Serial Web Management shortc...

Страница 230: ...APPENDIX A SERIAL WEB UTILITY The connection is complete if the password panel of the Web interface is displayed You are now ready to manage the Switch or stack see Working With the Web Interface on page 43 ...

Страница 231: ...pgrade Utility Problems on page 220 Using the Upgrade Utility The upgrade utility works from an MS DOS prompt and it upgrades one Switch at a time Upgrading a Switch may take up to 30 minutes To upgrade the management software of a Switch 1 Connect the serial COM port of your PC to the console port of the Switch using a null modem cable 2 Insert the CD ROM into your CD ROM drive 3 If you are using...

Страница 232: ...ails You can also use the following parameter with the upgrade command to specify the serial COM port to use for the PC COM 1 or COM 2 The default for this is COM 1 c 1 or c 2 An example of the upgrade command with this parameter is update c 1 s2sxx_yy bin 6 Power down the Switch 7 At your PC press Return 8 Power up the Switch immediately within 5 seconds The utility transfers the management softw...

Страница 233: ... that allows them to advertise their capabilities for speed duplex and flow control When connected to a port that also supports auto negotiation the link can automatically configure itself to the optimum setup backbone The part of a network used as a primary path for transporting traffic between network segments bandwidth The information capacity measured in bits per second that a channel can tran...

Страница 234: ...roblem with a device particularly if it is not accompanied by a general increase in traffic CSMA CD Carrier sense Multiple Access with Collision Detection The protocol defined in Ethernet and IEEE 802 3 standards in which devices transmit only after finding a data channel clear for a period of time When two devices transmit simultaneously a collision occurs and the colliding devices delay their re...

Страница 235: ...specific use of GARP that allows endstations to register that they would like to receive traffic from certain multicast groups GVRP GARP VLAN Registration Protocol A specific use of GARP that allows endstations to register that they would like to receive traffic for certain VLANs half duplex A system that allows packets to transmitted and received but not at the same time Contrast with full duplex...

Страница 236: ...ingly IP Internet Protocol IP is a layer 3 network protocol that is the standard for sending data through a network IP is part of the TCP IP set of protocols that describe the routing of packets to addressed devices IPX Internetwork Packet Exchange IPX is a layer 3 and 4 network protocol designed for networks that use Novell Netware IP address Internet Protocol address A unique identifier for a de...

Страница 237: ... MDI X Medium Dependent Interface Cross over An Ethernet port connection where the internal transmit and receive lines are crossed MIB Management Information Base A collection of information about the management characteristics and parameters of a networking device MIBs are used by the Simple Network Management Protocol SNMP to gather information about the devices on a network The Switch contains ...

Страница 238: ...another port on the Switch Roving analysis is used when you want to monitor the physical characteristics of a LAN segment without changing the characteristics by attaching a monitoring device RPS Redundant Power System A device that provides a backup source of power when connected to a Switch segment A section of a LAN that is connected to the rest of the network using a switch or bridge server A ...

Страница 239: ...and is the protocol of the Internet TCP relates to the content of the data travelling through a network ensuring that the information sent arrives in one piece when it reaches its destination IP relates to the address of the endstation to which data is being sent as well as the address of the destination network Telnet A TCP IP application protocol that provides a virtual terminal service letting ...

Страница 240: ... be carried on a single link VLT Virtual LAN Trunk A Switch to Switch link that carries traffic for all the VLANs on each Switch WAN Wide Area Network A communications network that covers a wide area A WAN can cover a large geographic area and may contain several LANs within it ...

Страница 241: ...alarm events 208 alarm settings default 208 Alarms RMON group 204 207 analysis ports defining 87 Apply button 53 audit log 209 autoDiscovery command Bridge MulticastFiltering RouterPort menu 108 autoDiscovery enabling and disabling 108 autoNegotiation command Ethernet menu 122 Auto negotiation listbox Port Setup page 61 Available Analysis Ports listbox Roving Analysis Setup page 87 Available Monit...

Страница 242: ...reate VLAN page 84 D default passwords 39 settings 29 users 39 Default Router field IP Setup page 59 Default VLAN 165 define command Feature Resilience menu 130 define command IP Interface menu 133 define command SNMP Trap menu 137 define command System Security User menu 147 delete command Bridge VLAN menu 117 Description field System Inventory menu 145 descriptive names specifying 46 67 Designat...

Страница 243: ...lo BPDUs 197 Help field Documentation page 70 Help icon 49 help See online help History RMON group 204 207 Hosts RMON group 205 207 Hosts Top N RMON group 205 207 I icons 3Com 49 3Com Contacts 49 3Com Library 49 3Com Support 49 Configuration 50 Documentation 49 External Link 49 Health 50 Help 49 Management 50 Management Settings 50 side bar 50 Unit 50 IEEE 802 1p multicast filtering 191 traffic pr...

Страница 244: ...ix RMON group 205 207 Matrix Cable 21 Matrix Module 21 matrix port 21 Max Age 197 Media Type field Port Setup page 61 menu area of the command line interface 97 menus displaying 100 modify command Bridge VLAN menu 118 modify command SNMP Trap menu 138 modify command System Security Access menu 150 modify command System Security User menu 148 monitor ports defining 87 multicast filtering 27 189 IEE...

Страница 245: ...em Inventory menu 145 priority in STP 196 problem solving 213 problems command line interface 216 Management Software Upgrade Utility 220 Serial Web Utility 219 SNMP management 218 web interface 214 Product Number field System Display menu 144 R RAP See roving analysis Received Stats fields Ethernet Statistics menu 124 refreshing the Switch graphic 55 registered IP address obtaining 38 Remote Moni...

Страница 246: ...ent switch 114 Spanning Tree hello timer setting for the current switch 115 Spanning Tree listbox Advanced Stack Setup page 77 Spanning Tree maximum age parameter setting for the current swtich 115 Spanning Tree path cost setting for the current port 112 Spanning Tree Protocol See STP Spanning Tree enabling or disabling for the current switch 116 speed of the ports displaying 55 specifying 62 121 ...

Страница 247: ...rsize field Ethernet Statistics menu 125 Unicast Packets field Ethernet Statistics menu 124 125 Unit column Switch Database page 73 unit command System menu 141 Unit Description field Unit Status page 56 Unit Graph page 91 Unit icon 50 Unit pages accessing 50 overview 50 unit statistics displaying 91 interpreting 92 Unit Status page 56 Unit Uptime field Unit Status page 57 Untagged VLAN listbox Po...

Страница 248: ...iguration page 66 Contact page 71 Create VLAN page 84 Documentation page 70 Edit VLAN page 84 exiting 45 External Link icons 49 Getting Started pages 46 Health pages overview 52 web interface continued Initialize page 88 IP Setup page 58 Location page 69 Management Settings pages overview 51 map 53 online documentation 34 online help 34 page area 48 50 making changes in 53 navigating 52 Password S...

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