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IBM 8271 Nways Ethernet LAN Switch, User Manual

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IBM 8271 Nways Ethernet LAN Switch User Manual Download Page 124

6-2

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HAPTER

 6: S

PANNING

 T

REE

 P

ROTOCOL

What is STP?

STP is a bridge-based system for providing fault tolerance on networks. 
It allows you to implement parallel paths for network traffic, and 
ensure that:

■

Redundant paths are disabled when the main paths are operational

■

Redundant paths are enabled if the main paths fail

As an example, Figure 6-1 shows a network containing three LAN 
segments separated by three bridges. With this configuration, each 
segment can communicate with the others using 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

, one of them from 

forwarding traffic. 

Figure 6-2 shows the result of enabling STP on the bridges in the 
configuration. The STP system has decided that traffic from LAN 
segment 2 to LAN segment 1 can only flow through Bridges C and A. 

If the link through Bridge C fails, as shown in Figure 6-3, the STP 
system reconfigures the network so that traffic from segment 2 flows 
through Bridge B.

Figure 6-1   

A network configuration that creates loops

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

Summary of Contents for 8271 Nways Ethernet LAN Switch

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

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

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

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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