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7-2

C

HAPTER

 7: RMON

What is RMON?

RMON is the common abbreviation for the Remote Monitoring MIB 
(Management Information Base), a system defined by the IETF 
documents RFC 1271 and RFC 1757, which allows you to monitor 
LANs remotely. 

A typical RMON setup consists of two components:

■

The RMON probe

 — An intelligent, remotely-controlled device or 

software agent that continually collects statistics about a LAN 
segment, and transfers the information to a management 
workstation on request or when a pre-defined threshold is crossed.

■

The management workstation

 — Communicates with the RMON 

probe and collects the statistics from it. The workstation does not 
have to be on the same network as the probe and can manage the 
probe by in-band or out-of-band connections.

The RMON Groups

The IETF define nine groups 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. 

Information from the Statistics group is used to detect changes in 
traffic and error patterns in critical areas of your network.

History

The History group provides historical views of network performance by 
taking periodic samples of the counters supplied by the Statistics group. 
The group features user-defined sample intervals and bucket counters 
for complete customization of trend analysis. 

The group is useful for analysis of traffic patterns and trends on a LAN 
segment, and to establish baseline information indicating normal 
operating parameters.

F24user.bk  Page 2  Wednesday, July 15, 1998  4:27 PM

Содержание 8271 Nways Ethernet LAN Switch

Страница 1: ...8271 Nways Ethernet LAN Switch Models F12 and F24 User s Guide F24user bk Page i Wednesday July 15 1998 4 27 PM...

Страница 2: ...f you have any comments on this publication please address them to Department CGF Design Information Development IBM Corporation PO Box 12195 RESEARCH TRIANGLE PARK NC 27709 U S A When you send inform...

Страница 3: ...t the Switch 1 2 Summary of Hardware Features 1 2 Summary of Software Features 1 2 Switch Front View Detail 1 4 10BASE T 100BASE TX Ports 1 4 LEDs 1 4 Switch Rear View Detail 1 6 Unit Information Labe...

Страница 4: ...Stacking Two Units 2 5 Stacking Multiple Units 2 6 The Power up Sequence 2 8 Connecting a Redundant Power System 2 8 Powering up the Switch 2 8 Checking for Correct Operation 2 8 Choosing the Correct...

Страница 5: ...ch 4 15 Configuring a Port on the Switch 4 16 Configuring the Console Port of the Switch 4 19 Changing the Management Settings for the Stack 4 21 Specifying a Descriptive Name for the Stack 4 21 Chang...

Страница 6: ...cifying IP and SLIP Information 5 9 Displaying IP and SLIP Information 5 10 Specifying Whether the Switch Uses BOOTP 5 10 Pinging Other Devices On Your Network 5 11 Viewing and Changing Information Ab...

Страница 7: ...t Alarm Settings 7 8 About the Audit Log 7 8 IV PROBLEM SOLVING 8 PROBLEM SOLVING Solving Problems Indicated by LEDs 8 2 Solving Problems That Occur When Using the Web Interface 8 2 Solving Problems T...

Страница 8: ...TILITY Using the Upgrade Utility C 1 D PIN OUTS Null Modem Cable D 1 PC AT Serial Cable D 1 Modem Cable D 2 RJ45 Pin Assignments D 2 E SWITCH TECHNICAL SPECIFICATIONS F TECHNICAL SUPPORT AND SERVICE E...

Страница 9: ...for Interference VCCI Statement G 7 Taiwanese Class A Warning Statement G 8 Korean Communications Statement G 8 Electronic Emission Notices for Unshielded Twisted Pair UTP Cable G 8 Federal Communica...

Страница 10: ...viii F24user bk Page viii Wednesday July 15 1998 4 27 PM...

Страница 11: ...ou first should become familiar with the related safety information DANGER Before you begin to install this product read the safety information in Caution Safety Information Read This First SD21 0030...

Страница 12: ...ez le livret Attention Informations pour la s curit Lisez moi d abord SD21 0030 qui d crit les proc dures respecter pour effectuer les op rations de c blage et brancher les quipements lectriques en to...

Страница 13: ...jeet Lue t m ensin SD21 0030 olevat turvaohjeet T ss kirjasessa on ohjeet siit miten s hk laitteet kaapeloidaan ja kytket n turvallisesti Vigy zat Miel tt megkezdi a berendez s zembe helyez s t olvass...

Страница 14: ...4 SAFETY NOTICES F24user bk Page 4 Wednesday July 15 1998 4 27 PM...

Страница 15: ...Safety Notices 5 F24user bk Page 5 Wednesday July 15 1998 4 27 PM...

Страница 16: ...6 SAFETY NOTICES F24user bk Page 6 Wednesday July 15 1998 4 27 PM...

Страница 17: ...oduct differs from the information in this guide follow the Release Notes Finding Specific Information in This Guide This table shows where to find specific information in this guide If you are lookin...

Страница 18: ...ce information Appendix List of terms used in this guide Glossary If you are looking for Turn to Table 1 Notice Icons Icon Notice Type Alerts you to Information note Important features or instructions...

Страница 19: ...ced Redundant Power System The words enter and type When you see the word enter in this guide you must type something and then press the Return or Enter key Do not press the Return or Enter key when a...

Страница 20: ...10 ABOUT THIS GUIDE F24user bk Page 10 Wednesday July 15 1998 4 27 PM...

Страница 21: ...I GETTING STARTED WITH THE SWITCH Chapter 1 Introducing the Switch Chapter 2 Installing the Switch Chapter 3 Setting Up for Management F24user bk Page 1 Wednesday July 15 1998 4 27 PM...

Страница 22: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...

Страница 23: ...can be used in your network It covers the following topics About the Switch Switch Front View Detail Switch Rear View Detail Switch Software Features Explained Default Settings for the Switch Network...

Страница 24: ...nits using Matrix Cables linked to a Matrix Module Slot for an Expansion Module or Matrix Module Connects to Redundant Power System Uninterruptable Power System 19 inch rack or stand alone mounting Su...

Страница 25: ...About the Switch 1 3 A choice of management methods Web based management Command line interface management SNMP management F24user bk Page 3 Wednesday July 15 1998 4 27 PM...

Страница 26: ...Mode of a link and provide the appropriate connection The maximum segment length is 100m 328ft over category 5 twisted pair cable As these ports are configured as MDIX cross over you need to use a cro...

Страница 27: ...eceived on the Expansion Module or Matrix Module port s Off No packets are being transmitted received on the Expansion Module or Matrix Module port s Status Yellow A valid Expansion Module or Matrix M...

Страница 28: ...anced Redundant Power System RPS to the Switch See Connecting a Redundant Power System on page 2 8 Console Port The console port allows you to connect a terminal and perform remote or local out of ban...

Страница 29: ...d simultaneously and in effect doubles the potential throughput of a link In addition full duplex supports 100BASE FX cable runs of up to 2km 6562ft Full duplex must always be enabled at both ends of...

Страница 30: ...ntil Security is disabled no other address can be learned For more information about enabling Security on a port see Configuring a Port on the Switch on page 4 16 Resilient Links The Resilient Link fe...

Страница 31: ...ntains management agent software that allows you to manage the stack using three methods Web interface management Each Switch unit in the stack has an internal set of web pages that allow you to manag...

Страница 32: ...abled Port Speed 10BASE T 100BASE TX ports are auto negotiated Duplex Mode 10BASE T 100BASE TX ports are auto negotiated Flow Control Enabled in half duplex IFM auto negotiated in full duplex Spanning...

Страница 33: ...24 as a Segmentation Switch The example in Figure 1 3 shows how the Switch can segment a network of shared 10 Mbps and 100 Mbps connections There is a 10 100 shared segment on each floor and these seg...

Страница 34: ...4 as a Collapsed Backbone Switch The example in Figure 1 4 shows how the Switch can act as a backbone for both shared and switched network segments Figure 1 4 Using the Switch as a collapsed backbone...

Страница 35: ...up of heavy traffic users that require dedicated 10 Mbps or 100 Mbps connections to the desktop The Model F24 has a Gigabit Ethernet Expansion Module that allows it to provide a Gigabit link to a Giga...

Страница 36: ...r 100 Mbps Fast Ethernet are slightly different to those for 10 Mbps Ethernet Figure 1 6 illustrates the key topology rules and provides examples of how they allow for large scale Fast Ethernet networ...

Страница 37: ...repeater to a router or switch plus 100m 328ft UTP run from a repeater out to the endstations Configuration Rules with Full Duplex The Switch provides full duplex support for all its ports including...

Страница 38: ...1 16 CHAPTER 1 INTRODUCING THE SWITCH F24user bk Page 16 Wednesday July 15 1998 4 27 PM...

Страница 39: ...e information you need to install and set up the Switch It covers the following topics Installing the Switch Stacking Units The Power up Sequence Choosing the Correct Cables Assigning IP Information F...

Страница 40: ...brackets and six screws is supplied with the Switch When deciding where to position the Switch ensure that You are able to meet the configuration rules detailed in Configuration Rules for Fast Ethern...

Страница 41: ...ne side of the Switch as shown in Figure 2 1 Figure 2 1 Fitting a bracket for rack mounting 3 Insert the three screws and tighten with a suitable screwdriver You must use the screws supplied with the...

Страница 42: ...a bracket for wall mounting 3 Insert the two screws and tighten with a suitable screwdriver 4 Repeat steps 2 and 3 for the other side of the Switch 5 Ensure that the wall you are using is smooth flat...

Страница 43: ...s Switch units can be stacked together and then treated as a single manageable unit with one IP address You can stack Switch units together in two ways The matrix port on the rear of the Switch allows...

Страница 44: ...stack To stack multiple Switch units 1 Arrange your Switch units as required They can be rack mounted or free standing if you choose to have them free standing remember to position the rubber feet as...

Страница 45: ...is cable to the matrix port of the Switch that contains the Matrix Module b Connect a second Matrix Cable to the port marked Unit 2 on the Matrix Module Connect the other end of this cable to the matr...

Страница 46: ...g sequence of steps to power up the Switch DANGER It is essential that the mains socket outlet is installed near to the unit and is accessible You can only disconnect the unit by removing the applianc...

Страница 47: ...kstations and servers are configured as MDI straight through If you want to make a connection to an MDI port you need to use a standard straight through cable This is illustrated in Figure 2 5 Figure...

Страница 48: ...to assign IP information to one unit in the stack This IP information is then used to manage the whole stack For more information about IP see Managing the Stack Over the Network on page 3 7 For deta...

Страница 49: ...Why Manage the Stack Methods of Managing a Stack Setting Up Web Interface Management Setting Up Command Line Interface Management Setting Up SNMP Management Managing the Stack Over the Network Logging...

Страница 50: ...of the following methods Web interface management Each Switch unit in the stack has an internal set of web pages that allow you to manage the stack using a Java enabled Web browser Command line interf...

Страница 51: ...nnector You can find a pin out diagram for the cable in Pin outs on page D 1 To connect the cable a Attach the female connector on the cable to the male connector on the console port of the Switch b T...

Страница 52: ...browse an IP stack is installed Installing Online Help and Documentation The CD ROM supplied with your Switch contains online help and online documentation that can be used with the web interface The...

Страница 53: ...agent IBM01_00 docs index htm The HTML version can be accessed directly using agent IBM01_00 docs F24TX index htm The PDF version can be accessed directly using agent IBM01_00 docs F24TX F24TX pdf We...

Страница 54: ...diagrams for both cables in Pin outs on page D 1 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...

Страница 55: ...tor 3 To open the Telnet session you must specify the IP address of the stack Check the documentation supplied with the Telnet facility if you are unsure how to do this Setting Up SNMP Management Any...

Страница 56: ...have a registered IP address you may be use an identical address to someone else and your network may not operate correctly Obtaining a Registered IP Address InterNIC Registration Services is the org...

Страница 57: ...d in the previous sections Logging in as a Default User If you manage a stack using the web interface or the command line interface you need to log on with a correct user name and password The stack h...

Страница 58: ...3 10 CHAPTER 3 SETTING UP FOR MANAGEMENT F24user bk Page 10 Wednesday July 15 1998 4 27 PM...

Страница 59: ...II MANAGING THE SWITCH Chapter 4 Working With the Web Interface Chapter 5 Working With the Command Line Interface F24user bk Page 1 Wednesday July 15 1998 4 27 PM...

Страница 60: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...

Страница 61: ...Settings for the Stack Configuring the Stack Viewing Statistics for the Current Switch Throughout this chapter the term stack refers to a number of Switches that are managed as a single unit A stack...

Страница 62: ...formation see Setting Up Web Interface Management on page 3 3 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...

Страница 63: ...t of Getting Started pages are displayed These are described in About The Getting Started Pages on page 4 4 If you have accessed the web interface before the main web interface is displayed For inform...

Страница 64: ...asked to enter 1 A descriptive 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 automatical...

Страница 65: ...do not know where the online help and online documentation is stored see Installing Online Help and Documentation on page 3 4 4 A new password for the current user enter the existing password if you...

Страница 66: ...ut the External Links see The External Link Icons on page 4 7 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...

Страница 67: ...Documentation on page 3 4 If you have set up the online documentation clicking the Documentation icon allows you to access the User Guides for the stack in a second browser window For information abo...

Страница 68: ...w the status of the ports It is always displayed above the other Unit pages Color Key This page allows you to view the color coding information used by the Switch Graphic page Port Summary This page a...

Страница 69: ...our 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...

Страница 70: ...4 36 Navigating the Page Area To access the first page of each category click on the relevant Management Icon on the side bar to access the remaining pages in the category click on the underlined hotl...

Страница 71: ...About the Main Web Interface 4 11 Figure 4 4 Web interface map F24user bk Page 11 Wednesday July 15 1998 4 27 PM...

Страница 72: ...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 as shown in Figure 4 5 containing a graphic of the Switch Note that...

Страница 73: ...6 Figure 4 6 The Port Summary page 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 G...

Страница 74: ...signing a new name for the Switch see Specifying a Descriptive Name for the Stack on page 4 21 Location Displays the physical location of the Switch For information about assigning a new location for...

Страница 75: ...are installed on the Switch Unit Uptime Displays the time that has elapsed since the Switch was last reset initialized or powered up Setting Up IP Information for the Switch You can set up the IP info...

Страница 76: ...a Subnet Mask on page 3 8 Default Router If your network contains one or more routers this field allows you to enter the IP address of the default router For more information about IP addresses see M...

Страница 77: ...Displays the current speed and Duplex Mode of the port FC indicates that flow control is enabled Auto negotiation Enabled Disabled Allows you to specify whether auto negotiation is enabled for the por...

Страница 78: ...is disabled or if the device at the other end of the link does not support auto negotiation this field allows you to specify the speed and Duplex Mode of the port HD indicates half duplex FD indicate...

Страница 79: ...s all the MAC Ethernet addresses stored for the port in the Switch Database and then learns the address of the first packet it receives on the port Once the first address is learned no other endstatio...

Страница 80: ...fig 1200 2400 4800 9600 19200 Allows you to specify the line speed baud rate of the console port If you select AutoConfig the line speed of the port is automatically set to the line speed of the termi...

Страница 81: ...of the online help and documentation for the stack Specify the details of a person to contact about the stack Specifying a Descriptive Name for the Stack You can specify a descriptive name for the sta...

Страница 82: ...hotlink The Password Setting page is displayed as shown in Figure 4 12 Figure 4 12 The Password Setting page The Password Setting page contains the following elements New Password Allows you to enter...

Страница 83: ...in Figure 4 13 Figure 4 13 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...

Страница 84: ...agement 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 on...

Страница 85: ...tails of a person to contact about the stack using the Contact page To access the Contact page 1 Click the Management Settings icon on the side bar 2 Click the Contact hotlink The Contact page is disp...

Страница 86: ...in the stack Initialize the Switch units in the stack Upgrade the management software of the Switch units in the stack Configuring the Switch Database of the Stack You can configure the Switch Databas...

Страница 87: ...ived Learned entries are removed aged out from the Switch Database if the stack does not receive packets from that endstation for 30 minutes This prevents the Switch Database from becoming full with o...

Страница 88: ...rom the Select Action Type drop down listbox select Display All 2 Click the Apply button Inserting Permanent Entries into the Switch Database The Switch Database page allows you to insert permanent en...

Страница 89: ...ies table is not automatically updated with the deletion To update the table a From the Select Action Type drop down listbox select Display All b Click the Apply button Configuring the Operating Modes...

Страница 90: ...ured as the time between receiving the last bit of the frame and transmitting the first bit Intelligent The stack monitors the amount of error traffic on the network and changes the Forwarding Mode ac...

Страница 91: ...lient Links hotlink The Resilient Links page is displayed as shown in Figure 4 18 Figure 4 18 The Resilient Links page What are Resilient Links The Resilient Link feature enables you to protect critic...

Страница 92: ...e set up if Neither of the ports are secure ports have Security enabled Neither of the ports belong to another resilient link pair A resilient link pair must only be defined at one end of the link Por...

Страница 93: ...displayed showing the new resilient link pair Deleting a Resilient Link Pair The Resilient Links page allows you to delete a resilient link pair To do this 1 Click the resilient link pair 2 Click the...

Страница 94: ...ayed To initialize the stack select Yes and then click Apply What Happens During an Initialization Initializing the Switch units in the stack returns them to their default factory settings You may wan...

Страница 95: ...ry on a TFTP server For information on using a TFTP Server see the documentation that accompanies it 2 Enter the name of the software upgrade file in the Filename field The filename format is nwsxx_yy...

Страница 96: ...Switch Displaying Unit 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...

Страница 97: ...h utilization of 26 85 yellow bar 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 deali...

Страница 98: ...Size distribution To display the Utilization graph 1 From the first drop down listbox choose a port 2 From the second drop down listbox choose Utilization 3 Click Apply To display the Total Errors gr...

Страница 99: ...ling 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...

Страница 100: ...4 40 CHAPTER 4 WORKING WITH THE WEB INTERFACE F24user bk Page 40 Wednesday July 15 1998 4 27 PM...

Страница 101: ...ace Menus A Quick Guide to the Commands Viewing and Changing Information About Ports in the Stack Viewing and Changing IP related Information Viewing and Changing Information About the Stack Throughou...

Страница 102: ...assigned a user name and password enter those details If you are accessing the command line interface for the first time enter a default user name and password to match your access requirements The de...

Страница 103: ...through each console port in the stack at the same time If the stack is being managed using Telnet the command line interface can be accessed by an unlimited number of users at the same time About th...

Страница 104: ...rmation for the stack and PING other devices in your network System Menu This menu contains commands that allow you to view and configure information about the Switch units in the stack or the stack a...

Страница 105: ...t 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 chang...

Страница 106: ...lays the IP information for the current Switch in the stack ip ping Allows you to PING other devices on your network system display Displays configuration information for the current Switch unit in th...

Страница 107: ...see Moving the Focus of the Command Line Interface on page 5 12 Enabling and Disabling Ports You can enable and disable Ethernet ports on the Switch using the portstate command on the Ethernet menu B...

Страница 108: ...statistics that are displayed are gathered in the time interval since the last reset initialization or power off on cycle Viewing and Changing IP related Information You can view and change IP related...

Страница 109: ...0 0 For more information about subnet masks see Subnets and Using a Subnet Mask on page 3 8 3 Enter a subnet mask if required The following prompt is displayed allowing you to enter the IP address of...

Страница 110: ...For more information about IP and SLIP see Managing the Stack Over the Network on page 3 7 To display the IP and SLIP information At the Top level menu enter ip interface display The IP and SLIP infor...

Страница 111: ...r network using the ping command on the IP menu To PING a device 1 At the top level menu enter ip ping The following prompt is displayed Enter destination IP address 2 Enter the IP address of the devi...

Страница 112: ...ocus of the Command Line Interface Many commands in the command line interface perform their actions on a single Switch unit in the stack the current Switch You can move the focus of the command line...

Страница 113: ...ow The configuration information contains the following read only fields Unit Name Displays the descriptive name or system name for the unit For information about assigning a new name see Specifying a...

Страница 114: ...plays the serial number of the unit Displaying Summary Information About the Switch Units in the Stack You can display summary information about the Switch units in the stack using the inventory comma...

Страница 115: ...name for the unit For information about assigning a new name see Specifying a Descriptive Name for the Stack on page 4 21 State This field displays the current operating state of the unit Operational...

Страница 116: ...Users cannot access the stack over the network using the command line interface Users cannot access the stack over the network using the web interface Users cannot access the Switch using an SNMP Net...

Страница 117: ...he Switch Database SDB Reset the statistic counters of the stack ATTENTION Resetting the stack may cause some of the traffic being transmitted over the network to be lost It also clears all Learned en...

Страница 118: ...he stack takes about 10 seconds to initialise While the stack is initializing the command line interface cannot communicate with the stack Upgrading the Management Software of the Stack You can upgrad...

Страница 119: ...uring the upgrade the Power Self Test LED flashes green and the command line interface is locked The upgrade takes about 5 minutes when the upgrade is complete the message Installation Complete is dis...

Страница 120: ...5 20 CHAPTER 5 WORKING WITH THE COMMAND LINE INTERFACE F24user bk Page 20 Wednesday July 15 1998 4 27 PM...

Страница 121: ...III ADVANCED NETWORKING FEATURES Chapter 6 Spanning Tree Protocol Chapter 7 RMON F24user bk Page 1 Wednesday July 15 1998 4 27 PM...

Страница 122: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...

Страница 123: ...ns more about STP and the STP features supported by the stack It covers the following topics What is STP How STP Works Enabling STP on a Stack STP is a part of the 802 1d bridge specification defined...

Страница 124: ...g two paths This configuration creates loops which cause the network to overload however STP allows you to have this configuration because it detects duplicate paths and immediately prevents or blocks...

Страница 125: ...What is STP 6 3 Figure 6 2 Traffic flowing through Bridges C and A Figure 6 3 Traffic flowing through Bridge B F24user bk Page 3 Wednesday July 15 1998 4 27 PM...

Страница 126: ...ular interval known as the Hello Time All other bridges in the network have a Root Port This is the port nearest to the Root Bridge and it is used for receiving the BPDUs initiated by the Root Bridge...

Страница 127: ...forwarding traffic STP Reconfiguration In the event of a network failure such as a segment going down the STP system reconfigures the network to cater for the changes If the topology of your network...

Страница 128: ...a certain interval the Max Age time the bridge assumes that the Root Bridge or a link between itself and the Root Bridge has gone down The bridge then initiates a reconfiguration of the network topolo...

Страница 129: ...onfiguration a Model E24 has STP enabled and is accidentally connected to a repeater using two links STP discovers a duplicate path and disables one of the links therefore avoiding a loop Figure 6 5 S...

Страница 130: ...om the web interface click the Configuration icon on the side bar The Stack Setup page is displayed 2 From the Spanning Tree drop down listbox select Enabled You cannot enable STP if you have set up r...

Страница 131: ...ir network This chapter explains more about the RMON concept and the RMON features supported by the stack It covers the following topics What is RMON Benefits of RMON RMON and the Stack You can only u...

Страница 132: ...and or out of band connections The RMON Groups The IETF define nine groups of Ethernet RMON statistics This section describes these groups and details how they can be used Statistics The Statistics gr...

Страница 133: ...ntation of the Hosts group Hosts Top N The Hosts Top N group extends the Hosts table by providing sorted host statistics such as the top 20 nodes sending packets or an ordered list of all nodes accord...

Страница 134: ...hs for important occurrences you can depend on the Event group for notification Through the SNMP traps events can trigger other actions providing a mechanism for an automated response to certain occur...

Страница 135: ...egment and stand alone RMON probes have traditionally been expensive Therefore an inexpensive RMON probe has been built into each stack This allows RMON to be widely deployed around the network withou...

Страница 136: ...200 alarms can be defined for the stack a new or initialized stack has two alarms defined for each port Broadcast bandwidth used Percentage of errors over one minute You can modify these alarms using...

Страница 137: ...for each alarm are shown in Table 7 2 Table 7 2 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 wi...

Страница 138: ...ager Each entry in the log contains information in the following order Entry number Timestamp User ID Item ID including qualifier New value of item There is a limit of 16 records on the number of chan...

Страница 139: ...IV PROBLEM SOLVING Chapter 8 Problem Solving F24user bk Page 9 Wednesday July 15 1998 4 27 PM...

Страница 140: ...F24user bk Page 10 Wednesday July 15 1998 4 27 PM...

Страница 141: ...cur When Using the Command Line Interface Solving Problems That Occur When Using an SNMP Network Manager Solving Problems With the Serial Web Utility Solving Problems With the Management Software Upgr...

Страница 142: ...and yet the Status LED for the port does not light Check that All connections are secure The devices at both ends of the link are powered up The connection uses cross over cable if you are linking a...

Страница 143: ...Either reload the web interface page or click in the part of the interface that has not displayed and select the reload frame option in your Web browser The web interface takes time to respond to com...

Страница 144: ...nd cannot log in Ask another user with Security access level to log in and initialize the stack This returns the Switch units in the stack to their default factory settings including any password info...

Страница 145: ...16 If the login sequence still does not display reset the stack For more information see Resetting All the Units in the Stack on page 4 33 or page 5 17 If this does not work initialize the stack For...

Страница 146: ...ftware Upgrade Utility see Using the Upgrade Utility on page C 1 Solving Problems That Occur When Using an SNMP Network Manager The SNMP Network Manager cannot access the stack Check that The IP infor...

Страница 147: ...your supplier for further advice Solving Problems With the Serial Web Utility You cannot connect to the web interface of the Switch Check that The Switch is powered up You are using a proper null mode...

Страница 148: ...rt 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 y...

Страница 149: ...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 repeater Disabling half du...

Страница 150: ...8 10 CHAPTER 8 PROBLEM SOLVING F24user bk Page 10 Wednesday July 15 1998 4 27 PM...

Страница 151: ...rial Web Utility Appendix C Management Software Upgrade Utility Appendix D Pin outs Appendix E Switch Technical Specifications Appendix F Technical Support and Service Appendix G Notices Trademarks an...

Страница 152: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...

Страница 153: ...t numbers to be used to order these power cords are listed below Unless otherwise noted all of the power cords listed below are 9 ft 2 8m 250V 10A unshielded power cords Country Part Number Feature Co...

Страница 154: ...any Greece Hungry Iceland Iran Kazakhstan Lebanon Luxembourg Macedonia Mozambique Netherlands Norway Poland Portugal Romania Russia Saudi Arabia Slovakia Slovenia Spain Sudan Sweden Syrian Arab Turkey...

Страница 155: ...et l enl vement de l unit doivent tre faits seulement par le personnel qualifi Ethiopia Italy 14F0069 F C 6858 Israel 14F0087 F C 6860 Switzerland Liechtenstein 14F0051 F C 6859 Namibia Pakistan Sout...

Страница 156: ...aind personeel Verra Yksik n saavat asentaa ja irrottaa vain t h n koulutetut henkil t Pericolo L installazione e la rimozione dell unit devono essere eseguite esclusivamente da personale specializzat...

Страница 157: ...Important Safety Information A 5 F24user bk Page 5 Wednesday July 15 1998 4 27 PM...

Страница 158: ...mada da parede esteja instalada pr xima unidade e esteja acess vel A unidade pode ser desconectada apenas ap s a remo o do engate Fare Det er vigtigt at hovedstikkontakten installeres i n rheden af en...

Страница 159: ...instalada cerca de la unidad y que sea accesible S lo se puede desconectar la unidad extrayendo el acoplador del aparato de la unidad Fara Det r viktigt att eluttaget sitter n ra enheten och att det r...

Страница 160: ...nch e est aussi en exploitation sous SELV DANGER Das Ger t wird mit Sicherheits Kleinspannung nach IEC 950 SELV Safety Extra Low Voltage betrieben Angeschlo en werden k nnen nur Ger te die ebenfalls n...

Страница 161: ...ima tensionedi sicurezza SELV Safety Extra Low Voltage secondo l IEC 950 Tali condizioni sono rispettate solo se anche l apparecchiaturaa cui l unit collegata funziona in SELV Fare Dette utstyret driv...

Страница 162: ...A 10 APPENDIX A SAFETY INFORMATION om utrustning till vilken enheten ansluts ocks arbetar med skyddsklensp nning IEC 950 SELV SELV F24user bk Page 10 Wednesday July 15 1998 4 27 PM...

Страница 163: ...gskabel vom Netzstrom getrennt ist Gevaar Zorg ervoor dat het netsnoer losgekoppeld is voordat u de klep van de IEC zekering opent of verwijdert Perigo Antes de abrir a tampa do fus vel do conector IE...

Страница 164: ...erigo Assegure se de que o cabo de alimenta o el ctrica est desligado antes de abrir a tampa do compartimento de fus veis do conector IEC ou de remover a cobertura da unidade Peligro Aseg rese de que...

Страница 165: ...ondante RPS recommand e Gefahr Diese Buchsen sind nur f r den Einstaz mit einer empfohlenen redundanten Stromversorgung RPS vorgesehen Gevaar Deze stekkerdozen zijn ontworpen om alleen te worden gebru...

Страница 166: ...lusivamente con il tipo di alimentatore addizionale raccomandato Fare Disse uttakene skal kun brukes til en anbefalt e kstra str mforsyningsenhet Perigo Estas tomadas foram concebidas para serem utili...

Страница 167: ...are shielded RJ45 data sockets They cannot be used as telephone sockets Only connect RJ45 data connectors to these Nevarnost Te vti nice so namenjene samo za uporabo s priporo enim redundantnim napaja...

Страница 168: ...telefoonaansluitingen Op deze contactdozen mogen alleenRJ45 gegevensstekkers worden aangesloten Er kunnen zowel afgeschermde als niet afgeschermde gegevenskabelsmet al dan niet afgeschermde aansluitin...

Страница 169: ...kene Perigo As portas RJ45 s o tomadas de dados RJ45 blindadas N o podem ser utilizadas como tomadas de telefone Ligue unicamente fichas de dados RJ45 a estas tomadas A estas tomadas de dados podem se...

Страница 170: ...suvky RJ45 Z suvky nemohou b t u v ny jako telefonn Do t chto z suvek p ipojujte pouze datov konektory RJ45 Do t chto datov ch z suvek mohou b t p ipojeny st n n i nest n n datov kabely se st n n mi...

Страница 171: ...condary connection point labelled Neutral connected directly to Earth Ground RJ45 RJ45 RJ45 Nevarnost Priklju ki RJ45 so oklopljene podatkovne vti nice Ne uporabljajte jih kot telefonske vti nice Vanj...

Страница 172: ...imentarse con fuentes IT impedance a la terre Si sus fuentes son de tipo IT esta unidad deber a alimentarse a 230V 2P T utilizando un transformador de ratio 1 1 con el punto de conexi n secundario eti...

Страница 173: ...Important Safety Information A 21 F24user bk Page 21 Wednesday July 15 1998 4 27 PM...

Страница 174: ...A 22 APPENDIX A SAFETY INFORMATION F24user bk Page 22 Wednesday July 15 1998 4 27 PM...

Страница 175: ...rial Line Interface Protocol SLIP If you have any problems accessing the Web interface using the Serial Web Utility see Solving Problems With the Serial Web Utility on page 8 7 Installing the Serial W...

Страница 176: ...rs dialog box is displayed showing all the settings 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 t...

Страница 177: ...ches the Serial Web Utility Serial Web Setup Displays the Advanced Configuration Parameters dialog box which allows you to view and change some of the settings the Serial Web Utility uses when it is r...

Страница 178: ...ing the various connection details Your default Web browser is then launched with the specified URL The connection is complete if the password panel of the Web interface is displayed You are now ready...

Страница 179: ...e any problems using the management software upgrade utility see Solving Problems With the Management Software Upgrade Utility on page 8 8 Using the Upgrade Utility The upgrade utility works from an M...

Страница 180: ...oftware 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 upg...

Страница 181: ...D PIN OUTS Null Modem Cable 9 pin to RS 232 25 pin PC AT Serial Cable 9 pin to 9 pin F24user bk Page 1 Wednesday July 15 1998 4 27 PM...

Страница 182: ...10BASE T and 100BASE TX RJ45 connectors Table D 1 Pin assignments Pin Number Signal Function Ports configured as MDI 1 TxData Transmit data 2 TxData Transmit data 3 RxDta Receive Data 4 Not assigned 5...

Страница 183: ...1 RxDta Receive Data 2 RxData Receive Data 3 TxData Transmit data 4 Not assigned 5 Not assigned 6 TxData Transmit data 7 Not assigned 8 Not assigned Table D 1 Pin assignments Pin Number Signal Functio...

Страница 184: ...D 4 APPENDIX D PIN OUTS F24user bk Page 4 Wednesday July 15 1998 4 27 PM...

Страница 185: ...EMC Emissions EN55022 Class B FCC Part 15 subpart B Class A ICES 003 Class A VCCI Class B AS NZS 3548 Class B Category 5 shielded cables must be used to ensure compliance with the class B requirement...

Страница 186: ...IB II RFC 1213 Bridge MIB RFC 1493 Repeater MIB RFC 1516 VLAN MIB RFC 1573 RMON MIB RFC 1271 BOOTP RFC 951 Terminal Emulation Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 IC...

Страница 187: ...This is the IBM Networking home page From here you can access product announcements publications and other information regarding hardware and software updates and a technical support information datab...

Страница 188: ...F 2 APPENDIX F TECHNICAL SUPPORT AND SERVICE F24user bk Page 2 Wednesday July 15 1998 4 27 PM...

Страница 189: ...have patents or pending patent applications covering subject matter in this document The furnishing of this document does not give you any license to these patents You can send license inquiries in wr...

Страница 190: ...s warranty terms apply The IBM Warranty for Machines IBM warrants that each Machine 1 is free from defects in materials and workmanship and 2 conforms to IBM s Official Published Specifications The w...

Страница 191: ...or machines which have a life time warranty this warranty is not transferable Warranty Service To obtain warranty service for the Machine you should contact your reseller or call IBM In the United Sta...

Страница 192: ...y you removal or alteration of Machine or parts identification labels or failure caused by a product for which IBM is not responsible THESE WARRANTIES REPLACE ALL OTHER WARRANTIES OR CONDITIONS EXPRES...

Страница 193: ...you This warranty gives you specific legal rights and you may also have other rights which vary from jurisdiction to jurisdiction Electronic Emission Notices for Shielded Twisted Pair STP Cable Federa...

Страница 194: ...This product is in conformity with the protection requirements of EU Council Directive 89 336 EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility IBM c...

Страница 195: ...VG sicherzusellen sind die Ger te wie in den IBM Hand chern angegeben zu installieren und zu betreiben CISPR22 Compliance Statement for Shielded Cable This product has been tested and found to comply...

Страница 196: ...and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the e...

Страница 197: ...appareil num rique de la classe A est conform la norme NMB 003 du Canada European Community CE Mark of Conformity Statement for Unshielded Cable This product is in conformity with the protection requ...

Страница 198: ...50082 1 Hinweis Wird dieses Ger te in eine Umgebung betrieben wie in EN 50082 2 festgelegt dann kann es dabei eventuell gest rt werden In solch einem Fall ist der Abstand bzw die Abschirmung zu der i...

Страница 199: ...atement Korean Communications Statement Please note that this device has been approved for business purpose with regard to electromagnetic interference If you find this is not suitable for your use yo...

Страница 200: ...G 12 APPENDIX G NOTICES TRADEMARKS AND WARRANTIES F24user bk Page 12 Wednesday July 15 1998 4 27 PM...

Страница 201: ...ween network segments bandwidth Information capacity measured in bits per second that a channel can transmit The bandwidth of Ethernet is 10 Mbps the bandwidth of Fast Ethernet is 100 Mbps baud rate T...

Страница 202: ...hernet networks operate at 10 Mbps using CSMA CD to run over cabling Fast Ethernet 100 Mbps technology based on the Ethernet CD network access method forwarding The process of sending a packet toward...

Страница 203: ...Management Information Base Stores a device s management characteristics and parameters MIBs are used by the Simple Network Management Protocol SNMP to contain attributes of their managed systems The...

Страница 204: ...k that will take over data transmission if the main port in the link fails switch A device which filters forwards and floods packets based on the packet s destination address The switch learns the add...

Страница 205: ...sing 5 2 Ethernet Menu 5 4 exiting 5 3 IP Menu 5 4 map 5 4 menu description 5 3 moving the focus of 5 12 number of simultaneous users 5 3 solving problems 8 5 System Menu 5 4 Top level menu 5 3 comman...

Страница 206: ...l Link 4 7 Health 4 8 Help 4 7 Library 4 7 Management 4 8 Management Settings 4 8 side bar 4 8 Support 4 7 Unit 4 8 Index 1 initialize command 5 17 Initialize page 4 34 initializing the stack 4 34 5 1...

Страница 207: ...5 of default users 3 9 path costs default 6 4 pin assignments modem cable D 2 null modem cable D 1 RJ45 D 2 serial cable D 1 ping command 5 11 pin outs D 1 Port column Switch Database page 4 27 Port f...

Страница 208: ...etup page 4 30 Spanning Tree Protocol See STP specifications system E 1 speed of the ports viewing 4 13 Speed Duplex listbox Port Setup page 4 18 stack configuring 4 26 5 12 standards supported E 2 St...

Страница 209: ...4 2 V Voice support F 1 W wall mounting a Switch 2 4 Web browsers required for the web interface 3 5 Web browsers configuring 8 3 web interface accessing 4 2 Advanced Stack Setup page 4 29 Apply butt...

Страница 210: ...6 INDEX F24user bk Page 6 Wednesday July 15 1998 4 27 PM...

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