3com DUA1860-0AAA01 Manuel du propriétaire

THE LINKBUILDER MSH 4 PORT ETHERNET BRIDGE MODULEUSER GUIDEPart No. DUA1860-0AAA01Published November 1994

x ABOUT THIS GUIDEDUA1860-0AAA01How To Use This Guide The following list shows where to find specific information: We recommend that you read Chapter

2-54 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01

3ADVANCED BRIDGINGThis chapter contains the following topics: Spanning Tree Configuration Custom Filter Configuration

3-2 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01IntroductionThis chapter describes how to set up the bridge's advanced features. If you have not pr

DUA1860-0AAA01Spanning Tree Configuration 3-3Spanning Tree Bridge ConfigurationSelect CONFIGURATION from the Main Menu. Select BRIDGES from the Config

3-4 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01ID: Display Field. The identification number for the bridge. The ID number uniquely identifies each bri

DUA1860-0AAA01Spanning Tree Configuration 3-5Hello Time: Text Field. Enter the hello time for the bridge. The hello time is the amount of time the br

3-6 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Spanning Tree Port ConfigurationSelect SPANNING PORT from the Bridges menu.The Port Settings screen appe

DUA1860-0AAA01Spanning Tree Configuration 3-7Port: Text Field. Enter the name of the port who's spanning tree parameters you want to change. Use

3-8 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Path Cost: Text Field. Enter the path cost. The path cost represents the performance cost of sending in

DUA1860-0AAA01Custom Filter Configuration 3-9Custom Filter ConfigurationYou can control the traffic that flows through the bridge by using the bridge&

DUA1860-0AAA01Conventions xiConventionsThe following table lists conventions that are used throughout this guide:“Enter” vs. “Type” When the word “ent

3-10 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Setting Up A Host-to-Host Filter SetSelect CONFIGURATION from the Main Menu. Select BRIDGES from the Co

DUA1860-0AAA01Custom Filter Configuration 3-11Set Number: Text Field. Enter the number of the filter set you want to set up. You can use any number f

3-12 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Saving Host-to-Host FiltersWhen you have set up your filter sets, you must use the Filter Options scree

DUA1860-0AAA01Custom Filter Configuration 3-13Setting Up A Host-to-Port Filter SetSelect HOST-TO-PORT from the Bridge Filters menu.The Host-to-Port sc

3-14 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Set Type: Text Field (inclusion / exclusion). Enter the filter set's type. You can define a filte

DUA1860-0AAA01Custom Filter Configuration 3-15Saving Host-to-Port FiltersWhen you have set up your filter sets, you must use the Filter Options screen

3-16 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Setting Up A Port-to-Port Filter SetSelect PORT-TO-PORT from the Bridge Filters menu.The Port-to-Port s

DUA1860-0AAA01Custom Filter Configuration 3-17Set Name: Text Field. This is optional. Enter a name for the filter set. The set name helps you identif

3-18 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Setting Up A Multicast-to-Port Filter SetSelect MULTICAST from the Bridge Filters menu.The Multicast sc

DUA1860-0AAA01Custom Filter Configuration 3-19Set Name: Text Field. This is optional. Enter a name for the filter set. The set name helps you identif

xii ABOUT THIS GUIDEDUA1860-0AAA01Special MessagesA special format indicates notes, cautions, and warnings. These messages are defined as follows:Note

3-20 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Setting Up A Protocol Filter SetSelect PROTOCOL from the Bridge Filters menu.The Protocol screen appear

DUA1860-0AAA01Custom Filter Configuration 3-21permit/deny: Text Field (permit / deny). Denote whether you want the protocols listed as members of the

3-22 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Saving Protocol FiltersWhen you have set up your filter sets, you must use the Filter Options screen to

DUA1860-0AAA01Custom Filter Configuration 3-23Setting Up A Bit FilterSelect BIT FILTERS from the Bridge Filters menu.The Configure Bit Filters screen

3-24 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Function: Text Field (O / I / A / Dn / En / n / S / H). Enter O to choose the output filter type, or I

DUA1860-0AAA01Custom Filter Configuration 3-25Byte Offset: Text Field. Defines the location of the beginning of VALUE as the number of bytes from the

3-26 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Saving Bit FiltersWhen you have set up your bit filters, you can use the Configure Bit Filters screen o

DUA1860-0AAA01Custom Filter Configuration 3-27The Host Filtering TableIt can be confusing to know which host-to-host and host-to-port filter sets devi

3-28 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Table Size: Display Field. The number of devices in the host filtering table (including the default ho

DUA1860-0AAA01Custom Filter Configuration 3-29Saving Host Filtering Table And Filter Set ChangesUse the Filter Options screen to save any changes made

DUA1860-0AAA01Related Publications xiiiRelated PublicationsIf you need more information about subjects not covered by this guide, you may find it usef

3-30 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01Saving And Turning Filters On And OffYou will need to turn bridge filters on for them to take effect. Y

DUA1860-0AAA01Custom Filter Configuration 3-31To disable all filters:1Enter off for the FILTERING ON/OFF field.2Reset the bridge.In all cases, resetti

3-32 CHAPTER 3: ADVANCED BRIDGINGDUA1860-0AAA01

4MONITORINGThis chapter contains the following topics: Checking Bridge Statistics Checking Port Activity Viewing Ethernet Statistics Checking User

4-2 CHAPTER 4: MONITORINGDUA1860-0AAA01IntroductionThis chapter describes simple checks you can make at regular intervals to ensure the bridge and net

DUA1860-0AAA01Checking Bridge Statistics 4-3Checking Bridge StatisticsSelect MONITORING from the Main Menu. Select BRIDGES from the Monitoring menu. S

4-4 CHAPTER 4: MONITORINGDUA1860-0AAA01Port State: Display Field. Displays the ports and their present state. The possible states are MOS, Forwarding

DUA1860-0AAA01Checking Bridge Statistics 4-5Learning means that the port is one step closer to bridging packets. Since the active topology may still b

4-6 CHAPTER 4: MONITORINGDUA1860-0AAA01PktsFilter: Display Field. The number of packets filtered by the bridge.Fwd: Display Field. The number of pac

DUA1860-0AAA01Checking Bridge Statistics 4-7There are three major observations you can make from the Bridge Statistics screen: Note the status of each

xiv ABOUT THIS GUIDEDUA1860-0AAA01

4-8 CHAPTER 4: MONITORINGDUA1860-0AAA01Checking Port ActivityYou can monitor individual bridge port activity for more specific traffic information if

DUA1860-0AAA01Checking Port Activity 4-9Averaging: Display Field. This field displays whether the averaging feature has been turned on or off. If it

4-10 CHAPTER 4: MONITORINGDUA1860-0AAA01Listening means that the port is preparing to enter the active topology. At this point the port is not used fo

DUA1860-0AAA01Checking Port Activity 4-11PktsFilter: Display Field. The number of packets filtered by the port.Fwd: Display Field. The number of pac

4-12 CHAPTER 4: MONITORINGDUA1860-0AAA01Viewing Ethernet StatisticsYou can use the Ethernet Statistics screen to check for suspected hardware problems

DUA1860-0AAA01Viewing Ethernet Statistics 4-13ReceivedBytes: Display Field. The number of bytes received by the port.Packets: Display Field. The num

4-14 CHAPTER 4: MONITORINGDUA1860-0AAA01Overflow: Display Field. Due to exceptional loading conditions, the bridge has become overloaded and packets

DUA1860-0AAA01Viewing Ethernet Statistics 4-15Deferrals: Display Field. The total number of deferrals on this port.Carrier Loss: Display Field. Duri

4-16 CHAPTER 4: MONITORINGDUA1860-0AAA01Checking User AccessSelect MONITORING from the Main Menu. Select SYSTEM from the Monitoring menu. Select LOGIN

DUA1860-0AAA01Checking User Access 4-17Number of unsuccessful logins: Display Field. The number of logins since the last bridge reset. An unsuccessfu

1INTRODUCTIONThis chapter contains the following topics: The LinkBuilder MSH The LinkBuilder MSH 4 Port Ethernet Bridge Module Managing The Bridge

4-18 CHAPTER 4: MONITORINGDUA1860-0AAA01

5FURTHER CONFIGURATION AND MONITORINGThis chapter contains the following topics: General Help Configuration Monitoring Viewing Node Table Informat

5-2 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01General HelpSelect GENERAL HELP from the Main Menu.The General Help screen appears, p

DUA1860-0AAA01Configuration 5-3ConfigurationDownloading Software UpgradesSelect CONFIGURATION from the Main Menu. Select SYSTEM from the Configuration

5-4 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Gateway IP Address: Text Field. If you're on a routed network, you will need to

DUA1860-0AAA01Configuration 5-5 Software does not downloadThe Boot Block User Interface appears, as shown in Figure 5-2, prompting you to change downl

5-6 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01The Permanent DatabaseUpto 1000 entries in the filtering database can be made permane

DUA1860-0AAA01Configuration 5-7Port Name: Text Field. The port you want to make the device permanent for.Changes to this field are saved immediately.

5-8 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Delete Permanent EntrySelect CONFIGURATION from the Main Menu. Select BRIDGES from th

DUA1860-0AAA01Configuration 5-9Transfer Permanent EntriesSelect CONFIGURATION from the Main Menu. Select BRIDGES from the Configuration menu. Select P

1-2 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01The LinkBuilder MSHThe LinkBuilder MSH is an extremely versatile chassis-based hub, which enables you to conn

5-10 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Editing ARP InformationARP ParametersSelect CONFIGURATION from the Main Menu. Select

DUA1860-0AAA01Configuration 5-11Add ARP EntrySelect CONFIGURATION from the Main Menu. Select NETWORK PROTOCOL from the Configuration menu. Select ARP

5-12 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Delete ARP EntrySelect CONFIGURATION from the Main Menu. Select NETWORK PROTOCOL fro

DUA1860-0AAA01Configuration 5-13Changing TCP CharacteristicsSelect CONFIGURATION from the Main Menu. Select NETWORK PROTOCOL from the Configuration me

5-14 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Changing Telnet CharacteristicsSelect CONFIGURATION from the Main Menu. Select NETWO

DUA1860-0AAA01Configuration 5-15Negotiate display options: Text Field. Causes the local system to display a transcription of the negotiation of virtu

5-16 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Port QueuingSelect CONFIGURATION from the Main Menu. Select SOFTWARE QUEUES from the

DUA1860-0AAA01Monitoring 5-17MonitoringViewing General Bridge InformationSelect MONITORING from the Main Menu. Select SYSTEM from the Monitoring menu.

5-18 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Available Buffers: Display Field. The number of buffers currently free in the bridg

DUA1860-0AAA01Viewing Node Table Information 5-19Viewing Node Table InformationNode Table By AddressSelect MONITORING from the Main Menu. Select BRIDG

DUA1860-0AAA01The LinkBuilder MSH 4 Port Ethernet Bridge Module 1-3The LinkBuilder MSH 4 Port Ethernet Bridge ModuleThe bridge module provides a bridg

5-20 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Node Table By Hash BucketSelect MONITORING from the Main Menu. Select BRIDGES from t

DUA1860-0AAA01Viewing Node Table Information 5-21Total Entries: Display Field. The total number of entries in the filtering database. You can have 49

5-22 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01- indicates that the address has not yet appeared at the port as a source address du

DUA1860-0AAA01Viewing Node Table Information 5-23Viewing Socket StatisticsSelect MONITORING from the Main Menu. Select NETWORK PROTOCOL from the Monit

5-24 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Proto: Display Field. The type of protocol in use at the local address displayed in

DUA1860-0AAA01Viewing Node Table Information 5-25FIN_WAIT_1 which means that the socket is closed and the connection is being closed.CLOSING which mea

5-26 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Viewing UDP StatisticsSelect MONITORING from the Main Menu. Select NETWORK PROTOCOL

DUA1860-0AAA01Viewing UDP Statistics 5-27Input Packets: Display Field. The total number of UDP packets received by the system. (udpInDatagrams in the

5-28 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Viewing TCP InformationTCP Data StatisticsSelect MONITORING from the Main Menu. Sele

DUA1860-0AAA01Viewing UDP Statistics 5-29duplicate acks: Display Field. The number of frames received where the TCP ACK bit was set and the Acknowled

1-4 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01The bridge module provides: Connection to each Ethernet bus in the MSH. An external connection by transceiver

5-30 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01discarded for bad header offset fields: Display Field. The number of packets receiv

DUA1860-0AAA01Viewing UDP Statistics 5-31TCP Connection StatisticsThe TCP Connection Statistics screen appears, as shown in Figure 5-20, after the TCP

5-32 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01embryonic connections closed: Display Field. The number of connections where a FIN

DUA1860-0AAA01Viewing UDP Statistics 5-33Viewing IP StatisticsSelect MONITORING from the Main Menu. Select NETWORK PROTOCOL from the Monitoring menu.

5-34 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01with size smaller than minimum: Display Field. The number of TCP packets received w

DUA1860-0AAA01Viewing UDP Statistics 5-35packets were fragmented on transmit: Display Field. The number of fragments the bridge transmitted. The FRAG

5-36 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Viewing ICMP Packet StatisticsSelect MONITORING from the Main Menu. Select NETWORK P

DUA1860-0AAA01Viewing UDP Statistics 5-37destination unreachable: Display Field. The number of ’destination unreachable’ messages sent (output) and r

5-38 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01time stamp reply: Display Field. The number of ’time stamp reply’ messages sent (ou

DUA1860-0AAA01Viewing UDP Statistics 5-39Viewing SNMP InformationSNMP StatisticsSelect MONITORING from the Main Menu. Select NETWORK PROTOCOL from the

DUA1860-0AAA01The LinkBuilder MSH 4 Port Ethernet Bridge Module 1-5Below its top ejector, the bridge has a panel of LEDs that indicate bridge activity

5-40 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Get Requests: Display Field. The number of GET requests received by the SNMP agent.

DUA1860-0AAA01Viewing UDP Statistics 5-41Out Bad Values: Display Field. The number of messages sent by the agent that contained the value ’badValue’

5-42 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01SNMP Authentication StatisticsThe SNMP Authentication Statistics screen appears, as

DUA1860-0AAA01Viewing UDP Statistics 5-43Viewing ARP TablesSelect MONITORING from the Main Menu. Select NETWORK PROTOCOL from the Monitoring menu. Sel

5-44 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Line: Display Field. The line number of the entry.IP Address: Display Field. The 3

DUA1860-0AAA01Viewing UDP Statistics 5-45Viewing Diagnostic InformationError LogSelect MONITORING from the Main Menu. Select DIAGNOSTICS from the Moni

5-46 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01Interactive DiagsSelect MONITORING from the Main Menu. Select DIAGNOSTICS from the M

DUA1860-0AAA01Viewing UDP Statistics 5-47Buffer Mem Check: Text Field. This verifies the memory buffers. Each time the test is performed, it will ran

5-48 CHAPTER 5: FURTHER CONFIGURATION AND MONITORINGDUA1860-0AAA01

6PROBLEM SOLVINGThis chapter contains the following topics: Spot Checks Using The LEDs For Fault Diagnosis Correcting Problems Removing And Replac

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8154© 3Com Corporation, 1994. All rights reserved. No part of this docu

1-6 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01A Transceiver Module can be fitted to the bridge, providing its fourth port, as shown in Figure 1-4. A range

6-2 CHAPTER 6: PROBLEM SOLVINGDUA1860-0AAA01Spot ChecksThis chapter explains how to check for problems and solve them. It is good practice to carry ou

DUA1860-0AAA01Using The LEDs For Fault Diagnosis 6-3Using The LEDs For Fault DiagnosisThe LEDs on the front of the module indicate bridge activity and

6-4 CHAPTER 6: PROBLEM SOLVINGDUA1860-0AAA01Correcting ProblemsBy working through this section, you should be able to isolate faults or find some poss

DUA1860-0AAA01Correcting Problems 6-5 If no other action works, there may be a problem with the other bridge's configuration. Erase the other bri

6-6 CHAPTER 6: PROBLEM SOLVINGDUA1860-0AAA01Collision ProblemsSymptom: Excessive collisions on an Ethernet port.Action: Check that your network is not

DUA1860-0AAA01Correcting Problems 6-7SNMP ProblemsSymptom: Cannot establish communication via SNMP.Action: Check that you have an IP address entered.

6-8 CHAPTER 6: PROBLEM SOLVINGDUA1860-0AAA01Removing And Replacing EquipmentInserting additional modules or a second Power Supply Unit into an active

DUA1860-0AAA01Spares 6-9SparesWe recommend that you have one spare module or Power Supply Unit for every ten in use. In the unlikely event that you sh

6-10 CHAPTER 6: PROBLEM SOLVINGDUA1860-0AAA01What To Do NextIf any of your LinkBuilder MSH equipment fails to operate correctly, contact your supplier

ALINK SETTINGSThe LinkBuilder MSH 4 Port Ethernet Bridge Module has a link, LK1, for resetting its configuration to default values, see Figure A-1.Fig

DUA1860-0AAA01Managing The Bridge 1-7Managing The BridgeThe bridge can be managed using either the VT100 management interface or remotely via SNMP usi

A-2 CHAPTER A: LINK SETTINGSDUA1860-0AAA01We recommend that the link method is only used when VT100 management is not possible, for example, when you&

B TECHNICAL INFORMATIONThe LinkBuilder MSH 4 Port Ethernet Bridge Module conforms to the following standards:Electrical IEEE 802.3, ISO DIS 8802/3Saf

B-2 CHAPTER B: TECHNICAL INFORMATIONDUA1860-0AAA01MIB IETF Bridge MIB (RFC 1286) RFC 1213 (MIB II) and RFC 1229/1239 extensions

CTECHNICAL SUPPORT3Com provides easy access to technical support information through a variety of services. This appendix describes these services.On-

.C-2 APPENDIX C: TECHNICAL SUPPORTDUA1860-0AAA01Ask3Com on CompuServeAsk3Com is a CompuServe-based service containing patches, software, drivers, and

DUA1860-0AAA01..3Com Documentation on CD-ROMC-3 NetFacts provides data sheets and technical articles on 3Com Corporation’s hub, bridge, router, termin

.C-4 APPENDIX C: TECHNICAL SUPPORTDUA1860-0AAA01Support from Your Network SupplierIf additional assistance is required, contact your network supplier.

DUA1860-0AAA01..Returning Products for RepairC-5Returning Products for RepairA product sent directly to 3Com for repair must first be assigned a Retur

.C-6 APPENDIX C: TECHNICAL SUPPORTDUA1860-0AAA01

INDEXNumerics3ComBBS C-13ComFacts C-2Aaccess, user 4-16active loops 1-16Add ARP Entry screen 5-11Add Permanent Entry screen 5-6adding bridge informati

1-8 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01BridgingThis section describes bridges and how they work.Why Use A Bridge?Bridges provide a way of joining tw

2 IndexDUA1860-0AAA01Checkingfor valid network connection 2-38LEDs, cabling and modules 6-2port activity 4-8user access 4-16Clear Error Log screen 5-4

INDEX3DUA1860-0AAA01HHardware Configuration screen 5-22hardware initialize A-1hash bucket 5-20help 5-2Host Filter Info screen 3-27host filtering table

4 IndexDUA1860-0AAA01operator accountsediting 2-22setting up 2-18Operator Accounts screen 2-20Operator Login screen 2-17Ppacket statistics 5-36perform

INDEX5DUA1860-0AAA01screenHost Filter Info 3-27Host-to-Host 3-10Host-to-Port 3-13ICMP Packet Statistics 5-36Initialize NOVRAM 2-27Interactive Diags 5-

6 IndexDUA1860-0AAA01STAP 1-16problems 6-6root bridge 1-17starting a Telnet session 2-42static routes 2-33configuring 2-33Static Routes screen 2-33sub

RADIO FREQUENCY INTERFERENCE STATEMENTSFCC StatementThis equipment has been tested with a class A computing device and has been found to comply with p

Information To The UserIf this equipment does cause interference to radio or television reception, which can be determined by turning the equipment of

LIMITED WARRANTYHARDWARE: 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, fo

WARRANTIES EXCLUSIVE: If a 3Com product does not operate as warranted above, Customer's sole remedy shall be repair, replacement, or refund of

DUA1860-0AAA01Bridging 1-9Local And Remote BridgesThere are two main types of bridge, local and remote. The LinkBuilder MSH 4 Port Ethernet Bridge Mod

1-10 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Bridge Network TopologyThe topology of a network is essentially its layout; how its component parts are inte

DUA1860-0AAA01Bridging 1-11Figure 1-9 An Example Topology

1-12 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Learning, Filtering And ForwardingTransparent bridges remain transparent to the network segments, treating t

DUA1860-0AAA01Bridging 1-13Figure 1-11, Figure 1-12, Figure 1-13 and Figure 1-14 illustrate how a bridge learns device addresses and uses address list

1-14 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Figure 1-13: Device C, connected to port 2, transmits a packet for device A. The bridge learns the address o

DUA1860-0AAA01Bridging 1-15The bridge performs ageing on address list entries. If a port has not received a packet from a device within a configured t

CONTENTSABOUT THIS GUIDEIntroduction ixHow To Use This Guide xConventions xiSpecial Messages xiiRelated Publications xiii1INTRODUCTIONThe LinkBuilder

1-16 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Spanning Tree Algorithm And Protocol (STAP)You can make your network more resilient by adding bridges and ne

DUA1860-0AAA01Bridging 1-17In a bridged network, a root bridge is elected to control the other bridges. The root bridge is made aware of any active lo

1-18 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01The STAP is also capable of constructing a new spanning tree should the unique path fail, see Figure 1-17, l

DUA1860-0AAA01Bridging 1-19Network resilience obviously leads to some path redundancy, as shown in Figure 1-18.Figure 1-18 Network ResilienceFor mor

1-20 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Bridge FiltersThe LinkBuilder MSH 4 Port Ethernet Bridge Module allows the use of customised filtering, whic

DUA1860-0AAA01Bridge Filters 1-21Figure 1-19: A filter set for port 2 has been set up allowing device A to communicate through the bridge and out of t

1-22 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Figure 1-21: Device B transmits a packet for device C. The bridge knows that device C is connected to port 2

DUA1860-0AAA01Bridge Filters 1-23Filter SetsA filter set is a group of devices that are allowed to communicate with each other. The 4 Port Ethernet Br

1-24 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Figure 1-22 illustrates a host-to-host filter example, and shows four network segments connected by a bridge

DUA1860-0AAA01Bridge Filters 1-25Exclusion means that devices in the set cannot communicate out of that port, and all other devices can. If the set is

2GETTING STARTEDIntroduction 2-2The VT100 Management Interface 2-3The VT100 Bridge Screens 2-4The VT100 Bridge Menu Map 2-6Bridge Control Keys 2-8Simp

1-26 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Port-to-Port FilteringA port-to-port filter set is a group of ports that are allowed to communicate through

DUA1860-0AAA01Bridge Filters 1-27Changes made to port-to-port filter sets are mirrored by the other port-to-port filter sets. For example, if ports 1

1-28 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Bit FilteringBit filters selectively filter out traffic based on bit values occurring in the first 64 bytes

DUA1860-0AAA01Bridge Filters 1-29Enabling Custom FilteringYou have to enable custom filtering before it becomes effective. You can enable and disable

1-30 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01Simple Network Management Protocol (SNMP)SNMP is an application-level protocol for managing products such as

DUA1860-0AAA01Installation And Removal 1-31Installation And RemovalWARNING: Please read the following safety and anti-static information before removi

1-32 CHAPTER 1: INTRODUCTIONDUA1860-0AAA01

2GETTING STARTEDThis chapter contains the following topics: The VT100 Management Interface The VT100 Bridge Menu Map Bridge Control Keys Simple Br

2-2 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01IntroductionThis chapter describes setting up the bridge for the first time. If you have not set up the br

DUA1860-0AAA01The VT100 Management Interface 2-3The VT100 Management InterfaceThe VT100 management interface is used for bridge management. The screen

Custom Filter Configuration 3-9Setting Up A Host-to-Host Filter Set 3-10Saving Host-to-Host Filters 3-12Setting Up A Host-to-Port Filter Set 3-13Savin

2-4 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The VT100 Bridge ScreensThe VT100 bridge screens have the same general layout. The components of a bridge

DUA1860-0AAA01The VT100 Management Interface 2-5E - Remote login identifier. The name of the user currently remotely logged on to the bridge.F - Inpu

2-6 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The VT100 Bridge Menu MapThe VT100 bridge menu map, as shown in Figure 2-2, shows the links between the br

DUA1860-0AAA01The VT100 Bridge Menu Map 2-7Operators with Administrator privileges are unrestricted. Operators with Operator privileges cannot configu

2-8 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Bridge Control KeysThere are special control keys for operating the bridge. These are different to the MSH

DUA1860-0AAA01Bridge Control Keys 2-9Return to Main Menu[Ctrl] + [T][Ctrl] + [C][Ctrl] + [Y][Esc] [T]Returns you to the Main Menu.Return to MSH Manage

2-10 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Refresh screen[Ctrl] + [V][Esc] [V]Refreshes the screen.Next step[Esc] [N] Takes you to the next menu or

DUA1860-0AAA01Simple Bridge Configuration 2-11Simple Bridge ConfigurationThis section describes how to configure a simple bridge that connects up to f

2-12 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Logging On To The LinkBuilder MSHLogging on to the LinkBuilder MSH is also described in The LinkBuilder M

DUA1860-0AAA01Simple Bridge Configuration 2-13The Logon screen appears and stays displayed until a valid User Name and Password have been entered, as

Delete Permanent Entry 5-8Transfer Permanent Entries 5-9Editing ARP Information 5-10ARP Parameters 5-10Add ARP Entry 5-11Delete ARP Entry 5-12Changing

2-14 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01When you are logged on to the LinkBuilder MSH, the Main Menu appears, as shown in Figure 2-5. It offers v

DUA1860-0AAA01Simple Bridge Configuration 2-15The Service Selection screen appears, listing all the services within the LinkBuilder MSH Chassis with t

2-16 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The Address Table screen appears, showing default address information for the bridge, as shown in Figure

DUA1860-0AAA01Simple Bridge Configuration 2-17Logging On To The BridgeWhen you connect to the bridge, the Operator Login screen appears, as shown in F

2-18 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Establishing Operator AccountsWhen you have logged on to the bridge, the bridge's Main Menu appears,

DUA1860-0AAA01Simple Bridge Configuration 2-19The Configuration menu appears, as shown in Figure 2-10. You can access all the configuration screens an

2-20 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The Operator Accounts screen appears, listing the operator accounts that are set up for the bridge, see F

DUA1860-0AAA01Simple Bridge Configuration 2-21Account Number: Text Field. Enter the account number of the operator you want to set up. You can set up

2-22 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The Edit User Accounts screen appears with information on the operator account you entered in the Operato

DUA1860-0AAA01Simple Bridge Configuration 2-23Operator Privilege: Choice Field (A / O). Designate the privileges for the operator. A is for administr

6PROBLEM SOLVINGSpot Checks 6-2Using The LEDs For Fault Diagnosis 6-3Correcting Problems 6-4Network Problems 6-4PING Or Telnet Problems 6-4Port Proble

2-24 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Adding Bridge InformationYou should provide general device information for your bridge the first time you

DUA1860-0AAA01Simple Bridge Configuration 2-25System Contact: Text Field. Enter the name of the person who is responsible for the bridge. This is a s

2-26 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Saving And Making Changes EffectiveSome of the changes you can make to the bridge are not saved if you si

DUA1860-0AAA01Simple Bridge Configuration 2-27Erasing All ChangesIf you want to erase all the changes made to the bridge since logging on, simply log

2-28 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Logging Off The BridgeSelecting LOGOUT from the Main Menu will log you off the bridge and return you to t

DUA1860-0AAA01IP Address Configuration 2-29IP Address ConfigurationThis section describes how to assign an IP address to the bridge. When the bridge h

2-30 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Bridge ConnectionsThe Telnet protocol is used for remotely logging on to a device. The following requirem

DUA1860-0AAA01IP Address Configuration 2-31Setting Up Remote AccessInitially, the bridge has no IP addressing information. When set up, the IP address

2-32 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01ActiveIP Address: Display Field. The bridge's current IP address. A line of dashes indicates that n

DUA1860-0AAA01IP Address Configuration 2-33Static RoutesIf you are using a routed network, you will need to enter a default gateway to ensure remote c

INDEXRADIO FREQUENCY INTERFERENCE STATEMENTSLIMITED WARRANTY

2-34 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Item: Text Field. The number of a configured static route or 0 (to enter a new route). Static routes are

DUA1860-0AAA01IP Address Configuration 2-35Preference: Text Field. A whole number from 0 to 255, designating the rank to be assigned to the route spe

2-36 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Assigning Host Name / IP Address PairsYou can assign symbolic names (host names) for devices that can com

DUA1860-0AAA01IP Address Configuration 2-37IP Address: Text Field. Enter the IP address for the device. It must be in decimal and of the form nnn.nnn

2-38 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Using PING To Test ConnectionsThe PING (Packet InterNet Groper) program checks for a valid connection to

DUA1860-0AAA01IP Address Configuration 2-39Select PING from the Applications menu.The Ping Settings screen appears, as shown in Figure 2-19. Enter the

2-40 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01The Ping screen appears, as shown in Figure 2-20, after the information for the Ping Settings screen has

DUA1860-0AAA01IP Address Configuration 2-41Packets Received: Display Field. The number of ICMP echo response messages that have been received from th

2-42 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Telnet Log On To Another IP Device From The BridgeThe bridge has Telnet capabilities, allowing you to rem

DUA1860-0AAA01IP Address Configuration 2-43 If the Remote Connect screen appears, as shown in Figure 2-21, you are allowed to Telnet out from the brid

ABOUT THIS GUIDEIntroductionThis guide contains all the information you need to install and use the LinkBuilder MSH 4 Port Ethernet Bridge Module. It

2-44 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Talking To Another Bridge UserThe bridge can accept two users, one local and one remote. If both users ar

DUA1860-0AAA01IP Address Configuration 2-45Telnet SuspensionYou can suspend your Telnet session from the bridge at any time. You may want to do this i

2-46 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01SNMP ConfigurationThis section describes configuration of the SNMP agent on the bridge. When the SNMP age

DUA1860-0AAA01SNMP Configuration 2-47TrapsAn SNMP agent can send messages, traps, when exceptional events occur. Traps include the name of the communi

2-48 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Configuring Basic Community CharacteristicsSelect CONFIGURATION from the Main Menu and then NETWORK PROTO

DUA1860-0AAA01SNMP Configuration 2-49Authentication Failure Trap: Text Field (e / d). Enable or disable the authentication failure trap for the SNMP

2-50 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01Access: Text Field (r/o / r/w). Enter the access mode for the community's MIB view. The effect this

DUA1860-0AAA01SNMP Configuration 2-51Configuring Community TrapsSelect COMMUNITY TRAPS from the Configure SNMP menu.The SNMP Community Trap Configurat

2-52 CHAPTER 2: GETTING STARTEDDUA1860-0AAA01IP Address / Host Name: Text Field. The host to which traps pertaining to the community name are to be s

DUA1860-0AAA01SNMP Configuration 2-53Enable: Text Field (y / n). Enter y to enable, or n to disable the Authentication Failure, Cold Start, Interface