Avaya Configuring Bridging Services Uživatelský manuál

Part No. 114060 Rev. AAugust 1996Router Software Version 11.0Site Manager Software Version 5.0 Configuring Bridging Services

x 114060 Rev. A NML Range Enable Parameter Description ...5-16Deleting NML from the Router .

Configuring Bridging Services2-40 114060 Rev. ASource Routing Interface Parameter DescriptionsUse these parameter descriptions as a guide when you con

Using Source Routing Bridge Services114060 Rev. A 2-41 Parameter: Source Routing Ring Number Default: 0x0 Range: 0x001 to 0xfff Function: Identifies

Configuring Bridging Services2-42 114060 Rev. A Parameter: Inbound STEs Default: Accept Options: Accept | Block Function: Specifies whether the bridge

Using Source Routing Bridge Services114060 Rev. A 2-43 Parameter: IP Address Default: None Options: Any valid IP address Function: Shows the IP addre

Configuring Bridging Services2-44 114060 Rev. A Parameter: Encapsulation Format Default: Proprietary Options: Proprietary | Standard Function: Indicat

Using Source Routing Bridge Services114060 Rev. A 2-45 you can select either Proprietary or Standard; however, you must set the same encapsulation for

Configuring Bridging Services2-46 114060 Rev. A2. Click on Add. The Add Bridge ID window appears (Figure 2-21).Figure 2-21. Add Bridge ID Window3.Ente

Using Source Routing Bridge Services114060 Rev. A 2-47 Parameter: New Source Routing Bridge ID Default: None Range: 1 to 15 Function: Specifies the ot

Configuring Bridging Services2-48 114060 Rev. AAdding an IP Explorer Address to the IP Explorer Address ListTo add an IP explorer address:1. Select Pr

Using Source Routing Bridge Services114060 Rev. A 2-49 3.Enter the new IP address in the New SR Bridge Explorer IP address field, using the description

114060 Rev. A xi Figures Figure 1-1. Forwarding Table Update ...1-2Figure 1-2.

Configuring Bridging Services2-50 114060 Rev. A4. Click on Done to exit the window. Site Manager returns you to the Configuration Manager window.Editin

Using Source Routing Bridge Services114060 Rev. A 2-51 Source Route Spanning Tree Global Parameter DescriptionsUse these parameter descriptions as a g

Configuring Bridging Services2-52 114060 Rev. A Parameter: Bridge Priority Default: 128 Range: 0 to 65535 Function: Combined with the Bridge MAC Addre

Using Source Routing Bridge Services114060 Rev. A 2-53 Parameter: Max Age Default: 20 seconds (expressed in hundredths of a second: 2000) Range: 6 t

Configuring Bridging Services2-54 114060 Rev. A Parameter: Hello Time Default: 2 seconds (expressed in hundredths of a second: 200) Range: 1 to 10 sec

Using Source Routing Bridge Services114060 Rev. A 2-55 Parameter: Forward Delay Default: 15 seconds (expressed in hundredths of a second: 1500) Range

Configuring Bridging Services2-56 114060 Rev. AEditing Source Route Spanning Tree Interface ParametersTo edit the source route spanning tree interface

Using Source Routing Bridge Services114060 Rev. A 2-57 Source Route Spanning Tree Interface Parameter DescriptionsUse these parameter descriptions as

Configuring Bridging Services2-58 114060 Rev. ADeleting Source Routing from the RouterTo delete source routing from all circuits on which you enabled

114060 Rev. A 3-1 Chapter 3Using NetBIOS ServicesThis chapter provides• An overview of the Network Basic Input/Output System (NetBIOS)• Implementation

xii 114060 Rev. A Figure 2-11. Tracking an IP-Encapsulated Frame from ES1 to ES2 ...2-17Figure 2-12. Structure of an IP-Encap

Configuring Bridging Services3-2 114060 Rev. AYou can configure the Bay Networks source routing bridge so that it treats NetBIOS names as though they h

Using NetBIOS Services114060 Rev. A 3-3 Establishing SessionsOnce a NetBIOS application determines that its name is unique on the network, the applica

Configuring Bridging Services3-4 114060 Rev. A6. Based on the information gained from the name-recognized frame accepted by the originating applicatio

Using NetBIOS Services114060 Rev. A 3-5 Name CachingThe source route bridge NetBIOS name cache contains NetBIOS names, MAC addresses and the RIF neede

Configuring Bridging Services3-6 114060 Rev. AFor optimal efficiency, you should use client name caching on the routers that are nearest to the servers

Using NetBIOS Services114060 Rev. A 3-7 If you disable datagram name caching, the source routing bridge cannot cache NetBIOS names and RIFs that it re

Configuring Bridging Services3-8 114060 Rev. AQuery caching consumes approximately 100 bytes per entry. Each cache entry remains in the query cache fo

Using NetBIOS Services114060 Rev. A 3-9 You can adjust the aging time for the name/RIF cache using the Name Cache Age parameter, which is a source rou

Configuring Bridging Services3-10 114060 Rev. ABy disabling client name caching when the source route network is configured as a spanning tree, name re

Using NetBIOS Services114060 Rev. A 3-11 Enabling NetBIOS ServicesThis section describes how to enable NetBIOS services under source routing. It assum

114060 Rev. A xiiiFigure 5-7. Circuit List Window ...5-14Figure 5-8. Ci

Configuring Bridging Services3-12 114060 Rev. AFigure 3-1. Configuration Manager WindowFor each NetBIOS parameter, this section describes default setti

Using NetBIOS Services114060 Rev. A 3-13 Editing NetBIOS Global ParametersTo edit the global NetBIOS parameters:1. Select Protocols > Source Routin

Configuring Bridging Services3-14 114060 Rev. ANetBIOS Global Parameter DescriptionsUse these parameter descriptions as a guide when you configure the

Using NetBIOS Services114060 Rev. A 3-15 Parameter: NetBIOS Datagram RIF Cache Default: Disable Options: Enable | Disable Function: Globally enables

Configuring Bridging Services3-16 114060 Rev. A Parameter: Max Name Cache Entries Default: 100 Range: 1 to 2147483648 Function: Specifies the maximum

Using NetBIOS Services114060 Rev. A 3-17 Parameter: Hash Entry Count Default: 253 Range: 253 to 2147483648 Function: Specifies the number of entries

Configuring Bridging Services3-18 114060 Rev. A Parameter: NetBIOS Query Cache Default: Disable Options: Enable | Disable Function: Globally enables o

Using NetBIOS Services114060 Rev. A 3-19 Parameter: Max Number Query Cache Entries Default: 100 Range: 1 to 100 Function: Specifies the maximum numbe

Configuring Bridging Services3-20 114060 Rev. AEditing NetBIOS Interface ParametersTo edit NetBIOS interface parameters:1. Select Protocols > Sourc

Using NetBIOS Services114060 Rev. A 3-21 NetBIOS Interface Parameter DescriptionsUse these parameter descriptions as a guide when you configure the par

Configuring Bridging Services3-22 114060 Rev. A Parameter: NetBIOS Datagram RIF Cache Default: Enable Options: Enable | Disable Function: Enables or d

Using NetBIOS Services114060 Rev. A 3-23 Using Statically Configured NetBIOS Clients and ServersThe following sections describe how to add, edit, and d

Configuring Bridging Services3-24 114060 Rev. AFigure 3-5. NetBIOS Window3.Enter values for the parameters, using the descriptions in the next section

Using NetBIOS Services114060 Rev. A 3-25 Parameter: NetBIOS Station Name Default: None Options: Any valid NetBIOS name Function: Specifies a NetBIOS n

Configuring Bridging Services3-26 114060 Rev. A Parameter: RIF from Router Default: None Options: Any valid RIF, with entries specified in hexadecimal

Using NetBIOS Services114060 Rev. A 3-27 Parameter: Enable Default: Enable Options: Enable | Disable Function: Enables or disables caching of the Net

Configuring Bridging Services3-28 114060 Rev. ADeleting a Statically Configured NetBIOS NameTo delete a statically configured NetBIOS name:1. Select Pro

Configuring Bridging Services3-30 114060 Rev. A

114060 Rev. A 4-1 Chapter 4Using Translation Bridge ServicesThis chapter contains• An overview of the transparent-to-source routing translation bridge

114060 Rev. A xv Tables Table A-1. Transparent Bridge Global Parameters ... A-1Table A-2. Transparent

Configuring Bridging Services4-2 114060 Rev. ADatabasesTo connect the TB and SR networks, the translation bridge uses two databases. The following sec

Using Translation Bridge Services114060 Rev. A 4-3 Bridge OperationsThe Bay Networks translation bridge software provides a link between the transpare

Configuring Bridging Services4-4 114060 Rev. A-- If the source address is in the RIF table, updates its routing information.-- If the destination addr

Using Translation Bridge Services114060 Rev. A 4-5 • If the destination address is not in the forwarding table, the transparent bridge forwards the fr

Configuring Bridging Services4-6 114060 Rev. AFrame Format SelectionThe Ethernet Version 2 and Ethernet 802.3 protocols transmit data using different

Using Translation Bridge Services114060 Rev. A 4-7 LAN SpeedsWhen the translation bridge transfers frames between networks that have different network

Configuring Bridging Services4-8 114060 Rev. A• Frame Relay• SMDS• PPP• Ethernet/802.3 encapsulation• FDDI encapsulation• Native SRB on FDDILoop-Free

Using Translation Bridge Services114060 Rev. A 4-9 You want to send a packet from TB Network 1 to TB Network 2. As shown in the figure, there are two p

Configuring Bridging Services4-10 114060 Rev. AFigure 4-2. Spanning Tree with Translation BridgingWhen you use the spanning tree protocol in a transla

Using Translation Bridge Services114060 Rev. A 4-11 The destination MAC address for these BPDUs is the bit-swapped address used for transparent spanni

Configuring Bridging Services4-12 114060 Rev. ARemember that the spanning tree algorithm works only if you use Token Ring interfaces to the SR network

Using Translation Bridge Services114060 Rev. A 4-13 Figure 4-3. Edit Translation Bridge Global Parameters Window Parameter: Virtual LAN ID Default: 0x

Configuring Bridging Services4-14 114060 Rev. ACreating the Translation BridgeTo configure the translation bridge to run on the router, select Protocol

Using Translation Bridge Services114060 Rev. A 4-15 Editing Translation Bridge ParametersOnce you configure the translation bridge to operate on the ro

Configuring Bridging Services4-16 114060 Rev. AFigure 4-5. Edit Translation Bridge Global Parameters Window2.Edit the parameters, using the descriptio

Using Translation Bridge Services114060 Rev. A 4-17 Translation Bridge Global Parameter DescriptionsUse these parameter descriptions as a guide when y

Configuring Bridging Services4-18 114060 Rev. A Parameter: Max Translation Entries Default: 255 Options: Any integer value Function: Specifies the maxi

Using Translation Bridge Services114060 Rev. A 4-19 Parameter: Broadcast Conversion Default: Enable Options: Enable | Disable Function: If you enable

Configuring Bridging Services4-20 114060 Rev. A Parameter: Source Route Explorer Type Default: Spanning Tree Options: Spanning Tree | All Routes Funct

Using Translation Bridge Services114060 Rev. A 4-21 Editing Translation Bridge MAC Address ConversionsToken Ring networks use functional addresses for

114060 Rev. A xvii About This Guide If you are responsible for configuring and managing Bay Networks ™ routers, you should read this guide to learn

Configuring Bridging Services4-22 114060 Rev. AFigure 4-6. Address Mapping List Window2.Click on Add. The Translation Bridge Address Mapping window ap

Using Translation Bridge Services114060 Rev. A 4-23 Translation Bridge Address Mapping Parameter DescriptionsUse these parameter descriptions as a gui

Configuring Bridging Services4-24 114060 Rev. AEditing Translation Bridge Station TypeThis section describes how to configure the translation bridge so

Using Translation Bridge Services114060 Rev. A 4-25 Figure 4-9. Translation Bridge Address Mapping Window3.Edit the parameters, using the descriptions

Configuring Bridging Services4-26 114060 Rev. A Parameter: Ethernet Type Default: Ethernet Options: Ethernet | IEEE8023 Function: Specifies the type of

114060 Rev. A 5-1 Chapter 5Using Native Mode LAN ServicesThis chapter provides an overview of Native Mode LAN (NML) services and implementation notes

Configuring Bridging Services5-2 114060 Rev. AEach LAN in a closed user group is connected to a bridge through an NML port. LAN A in the Star Closed U

Using Native Mode LAN Services114060 Rev. A 5-3 In Figure 5-1, for example, consider what happens when a member of the Star Closed User Group on LAN A

Configuring Bridging Services5-4 114060 Rev. ADefining a Closed User Group That Permits Overlapping Network TrafficIn an NML environment, overlapping tr

Using Native Mode LAN Services114060 Rev. A 5-5 Enabling NML ServicesComplete the following steps to enable NML on an interface:1. Select Native Mode

Configuring Bridging Servicesxviii 114060 Rev. A Conventions angle brackets (< >) Indicate that you choose the text to enter based on the descr

Configuring Bridging Services5-6 114060 Rev. AEditing NML ParametersOnce you configure a circuit to support NML, you can use the Configuration Manager t

Using Native Mode LAN Services114060 Rev. A 5-7 Figure 5-3. Configuration Manager WindowEditing NML Interface ParametersTo edit NML interface parameter

Configuring Bridging Services5-8 114060 Rev. AFigure 5-4. NML Interfaces Window2.Edit the parameters, using the descriptions in the next section as a

Using Native Mode LAN Services114060 Rev. A 5-9 Parameter: Disable Default: Enabled Options: Enabled | Disabled Function: Enables and disables the NM

Configuring Bridging Services5-10 114060 Rev. A Parameter: SAID Type Default: Individual Options: Individual | Group Function: Ignored by Bay Networks

Using Native Mode LAN Services114060 Rev. A 5-11 Parameter: Security List Action Default: Forward Options: Drop | Forward Function: Specifies whether

Configuring Bridging Services5-12 114060 Rev. AFigure 5-5. NML Filters Window3.Select the circuit to which you want to add an access list.4. Click on

Using Native Mode LAN Services114060 Rev. A 5-13 Site Manager returns you to the NML Filters window.7. Repeat Steps 3 through 6 to add additional star

Configuring Bridging Services5-14 114060 Rev. AEnabling RangesTo enable or disable the ranges you set for a selected circuit:1. Select the Circuits &g

Using Native Mode LAN Services114060 Rev. A 5-15 Figure 5-8. Circuit Definition Window4.Select Protocol > Edit NML > Security List. The NML Filte

About This Guide 114060 Rev. A xix Acronyms APE all-paths explorer frameARE all-routes explorer frameARP Address Resolution ProtocolBPDU Bridge Prot

Configuring Bridging Services5-16 114060 Rev. ANML Range Enable Parameter DescriptionUse this parameter description as a guide when you enable or disa

114060 Rev. A A-1 Appendix ASite Manager Default SettingsThis appendix describes the Site Manager default parameter settings for the transparent bridg

Configuring Bridging ServicesA-2 114060 Rev. ATable A-3. Spanning Tree Global Parameters Parameter DefaultEnable EnableBridge Priority 128Bridge MAC

Site Manager Default Settings114060 Rev. A A-3 Table A-5. Source Routing Global Parameters Parameter DefaultEnable EnableSR Bridge Internal LAN ID 0x

Configuring Bridging ServicesA-4 114060 Rev. ATable A-6. Source Routing Interface Parameters Parameter DefaultEnable EnableMax number of RDs 7Source

Site Manager Default Settings114060 Rev. A A-5 Table A-9. Source Route Spanning Tree Global ParametersParameter DefaultSpanning Tree Enable EnableBrid

Configuring Bridging ServicesA-6 114060 Rev. ATable A-11. NetBIOS Global ParametersParameter DefaultNetBIOS Server Name Cache DisableNetBIOS Client Na

Site Manager Default Settings114060 Rev. A A-7 Table A-13. NetBIOS Static Name ParametersParameter DefaultEnable EnableNetBIOS Station Name NoneMac Ad

Configuring Bridging ServicesA-8 114060 Rev. ATable A-16. Translation Bridge Ethernet Address Mapping ParametersParameter DefaultEthernet MAC Address

114060 Rev. A B-1 Appendix BComponents of a Source Route FrameA source route frame consists of the fields shown in Figure B-1.Figure B-1. Fields in a S

ii 114060 Rev. A4401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821 Copyright © 1988–1996 Bay Networks, Inc. All rig

Configuring Bridging Servicesxx 114060 Rev. A SSAP session service access pointSTE spanning tree explorer frameTB transparent bridgingXNS Xerox Netwo

Configuring Bridging ServicesB-2 114060 Rev. ARouting Information Field (RIF)For source routing purposes, the most important part of a frame is the Ro

Components of a Source Route Frame114060 Rev. A B-3 Type of FrameThe first three bits specify the type of frame and the return frame requested. These b

Configuring Bridging ServicesB-4 114060 Rev. AA possible value for the routing control field follows:011:1500010:2052011:4472100:8144101:11407110:17800

114060 Rev. A Index-1 Symbols15-character Name Caching parameter, 3-15802.3 framestranslated by translation bridge, 4-6translated by transparent bridg

Configuring Bridging ServicesIndex-2 114060 Rev. ABridge Tunnel Service, 1-4Bridge, transparent. See Transparent bridgeBroadcast Conversion parameter,

Index114060 Rev. A Index-3 FFDDI framestranslated by transparent bridge, 1-3 to 1-8Filters, 1-14Forward Delay parameter, 1-29, 2-55Forwarding tablebri

Configuring Bridging ServicesIndex-4 114060 Rev. AMulticast addresses, 4-21NName Cache Age parameter, 3-16Name query frame, 3-3Name recognized frame,

Index114060 Rev. A Index-5 RRange Enable (NML) parameter, 5-16Range End (NML) parameter, 5-13Range Start (NML) parameter, 5-13RIF from Router paramete

Configuring Bridging ServicesIndex-6 114060 Rev. ASource Routing Translate/Learning Bridgeenabling on a circuit, 4-12Source routing-to-transparent tra

Index114060 Rev. A Index-7 Translation Bridge Enable parameter, 1-24Translation services, transparent bridge, 1-2, 1-3 to 1-8Transparent bridgeas desi

114060 Rev. A xxi Technical Support and Online Services To ensure comprehensive network support to our customers and partners worldwide, Bay Network

Configuring Bridging Servicesxxii 114060 Rev. A Bay Networks Customer Service If you purchased your Bay Networks product from a distributor or autho

Technical Support and Online Services 114060 Rev. A xxiii Bay Networks Information Services Bay Networks Information Services provide up-to-date sup

Configuring Bridging Servicesxxiv 114060 Rev. A Support Source CD This CD-ROM -- sent quarterly to all contracted customers -- is a complete Bay Netw

Technical Support and Online Services 114060 Rev. A xxv InfoFACTS InfoFACTS is the Bay Networks free 24-hour fax-on-demand service. This automated s

114060 Rev. A 1-1 Chapter 1Using Transparent Bridge Services This chapter contains information on the following topics:• The transparent bridge, inc

Configuring Bridging Services1-2 114060 Rev. A A transparent bridge also provides some translation services, converting frames for bridging between E

Using Transparent Bridge Services114060 Rev. A 1-3 The bridge then forwards (relays to another network) or drops (discards) the frame based on the for

114060 Rev. A iii Bay Networks Software License This Software License shall govern the licensing of all software provided to licensee by Bay Networ

Configuring Bridging Services1-4 114060 Rev. AFigure 1-2. RFC 1042 EncapsulationAppleTalk Address Resolution Protocol (ARP) frames (Ethernet frames wi

Using Transparent Bridge Services114060 Rev. A 1-5 Figure 1-4. Ethernet to FDDI TranslationFCSDATATYPEThrough Bridge A to FDDI LANFrom Ethernet LANDA

Configuring Bridging Services1-6 114060 Rev. AFigure 1-5. FDDI to Ethernet TranslationBridge BEthernet LAN1 Ethernet LAN2FDDI LANBridge ABRG0028AFCSDA

Using Transparent Bridge Services114060 Rev. A 1-7 Figure 1-6. Ethernet/802.3 to FDDI TranslationThe translation process from the FDDI LAN to Ethernet

Configuring Bridging Services1-8 114060 Rev. A Figure 1-7. AppleTalk ARP (Originating on FDDI) to 802.3 TranslationSpanning Tree AlgorithmThe spanning

Using Transparent Bridge Services114060 Rev. A 1-9 Figure 1-8. Parallel Bridge TopologyWhen Endstation J initially sends a frame to Endstation K, both

Configuring Bridging Services1-10 114060 Rev. ANext, Endstation K receives two copies of the frame, resulting in an inefficient use of the available ba

Using Transparent Bridge Services114060 Rev. A 1-11 In constructing a loop-free topology, the bridges within the extended network follow these steps:1

Configuring Bridging Services1-12 114060 Rev. AFigure 1-10. Root Port Determination (Equal Path Costs and Root Interface Priorities)The spanning tree

Using Transparent Bridge Services114060 Rev. A 1-13 Figure 1-11 shows the resulting logical topology, which provides a loop-free topology with only a

iv 114060 Rev. A Bay Networks Software License (continued) 9. Licensee shall not reverse assemble, reverse compile, or in any way reverse engineer

Configuring Bridging Services1-14 114060 Rev. AFigure 1-12. Inefficient Spanning Tree TopologyFiltering FramesYou use filters mainly for security reason

Using Transparent Bridge Services114060 Rev. A 1-15 Refer to Configuring Traffic Filters and Protocol Prioritization for details about filters and how to

Configuring Bridging Services1-16 114060 Rev. AWhen you enable spanning tree service, you need only configure the Bridge Priority and Bridge MAC Addres

Using Transparent Bridge Services114060 Rev. A 1-17 Figure 1-13. Spanning Tree Autoconfiguration Window Parameter: Bridge Priority Default: 128 Range:

Configuring Bridging Services1-18 114060 Rev. A Parameter: Bridge MAC Address Default: Defaults to a unique MAC address that the router automatically

Using Transparent Bridge Services114060 Rev. A 1-19 Figure 1-14. Configuration Manager WindowFor each bridge and spanning tree parameter, this section

Configuring Bridging Services1-20 114060 Rev. A1. Select Protocols > Bridge > Global from the Configuration Manager window (refer to Figure 1-14)

Using Transparent Bridge Services114060 Rev. A 1-21 Parameter: Bridge Table Size Default: 1024 entries Options: 1024 | 2048 | 4096 | 8192 | 16384 | 3

Configuring Bridging Services1-22 114060 Rev. A Parameter: Enable Forwarding DB Default: Enable Options: Enable | Disable Function: If you enable this

Using Transparent Bridge Services114060 Rev. A 1-23 Figure 1-16. Bridge Interfaces Window2.Select the interface you want to edit.3. Edit the parameter

114060 Rev. A v Contents Configuring Bridging Services About This Guide Before You Begin ...

Configuring Bridging Services1-24 114060 Rev. A Parameter: Enable Default: If you added bridging using either the Quick-Start procedure or the configur

Using Transparent Bridge Services114060 Rev. A 1-25 Figure 1-17. Edit Spanning Tree Global Parameters Window2. Edit the parameters, using the descript

Configuring Bridging Services1-26 114060 Rev. A Parameter: Bridge Priority Default: 128 Range: 0 to 65535 Function: Combined with the Bridge MAC Addre

Using Transparent Bridge Services114060 Rev. A 1-27 If the values for Max Age, Hello Time, and Forward Delay are not the same for each bridge in your

Configuring Bridging Services1-28 114060 Rev. A Parameter: Hello Time Default: 2 seconds (expressed in hundredths of a second: 200) Range: 1 to 10 sec

Using Transparent Bridge Services114060 Rev. A 1-29 Parameter: Forward Delay Default: 15 seconds (expressed in hundredths of a second: 1500) Range: 4

Configuring Bridging Services1-30 114060 Rev. AFigure 1-18. Spanning Tree Interfaces Window2.Select the interface you want to edit.3. Edit the paramet

Using Transparent Bridge Services114060 Rev. A 1-31 Spanning Tree Interface Parameter DescriptionsUse these parameter descriptions as a guide when you

Configuring Bridging Services1-32 114060 Rev. A Parameter: Path Cost Default: 1 Range: 1 to 65535 Function: When this port is the root port, the path

Using Transparent Bridge Services114060 Rev. A 1-33 Deleting the Bridge and Spanning Tree from the RouterTo delete the bridge or spanning tree from al

vi 114060 Rev. A Bridge Global Parameter Descriptions ...1-20Editing Bridge Interfac

114060 Rev. A 2-1 Chapter 2Using Source Routing Bridge ServicesThis chapter • Contains an overview of source routing technology• Describes how the Bay

Configuring Bridging Services2-2 114060 Rev. AEach LAN segment has a unique network-wide identification number, or ring ID. Each source routing bridge

Using Source Routing Bridge Services114060 Rev. A 2-3 Figure 2-2. Source Routing DesignatorAfter the bridge adds the routing designator, the other bri

Configuring Bridging Services2-4 114060 Rev. ASpecific RoutingWhen an endstation receives an ARE or STE frame, it generates a single frame, called a sp

Using Source Routing Bridge Services114060 Rev. A 2-5 How IP Encapsulation WorksWhen you enable IP encapsulation on a source routing bridge (thus maki

Configuring Bridging Services2-6 114060 Rev. AFigure 2-4. Source Routing over an IP Network5461.1.2.2 1.1.3.3711.1.1.11.1.5.531.1.2.21.1.3.31.1.5.5IP

Using Source Routing Bridge Services114060 Rev. A 2-7 When Bridge A receives a source routed frame destined for an endstation on Ring 4, it examines t

Configuring Bridging Services2-8 114060 Rev. AIP Encapsulation FeaturesBay Networks implementation of IP encapsulation allows you to:• Configure redund

Using Source Routing Bridge Services114060 Rev. A 2-9 Source Route Endstation SupportThe Bay Networks routers running IP, IPX, XNS, AppleTalk, and VIN

114060 Rev. A viiConfiguring IP Encapsulation Support ...2-24Enabling Source Routing S

Configuring Bridging Services2-10 114060 Rev. AFigure 2-6. IP Routers Source Routing across a Token Ring Network How the Bay Networks Source Routing B

Using Source Routing Bridge Services114060 Rev. A 2-11 Source Routing across a Token Ring NetworkThe Bay Networks source routing bridge handles incomi

Configuring Bridging Services2-12 114060 Rev. AHow the Source Routing Bridge Handles Explorer FramesThis section provides instructions on how the Bay

Using Source Routing Bridge Services114060 Rev. A 2-13 Figure 2-8. Structure of an Explorer FrameES2 ES1 8270 DSAP SSAP DATAES2 ES1 883

Configuring Bridging Services2-14 114060 Rev. AHow the Source Routing Bridge Handles Specifically Routed FramesThis section describes how the Bay Netwo

Using Source Routing Bridge Services114060 Rev. A 2-15 Example A: First of several bridges to receive the SRFThe frame received by Bridge C from Ring

Configuring Bridging Services2-16 114060 Rev. AFigure 2-10. Structure of a Specifically Routed Frame from ES2 to ES1C000A2FFFFFA ES2 0CB0 001A

Using Source Routing Bridge Services114060 Rev. A 2-17 Source Routing across an IP NetworkThis section provides details on how IP encapsulation works

Configuring Bridging Services2-18 114060 Rev. ATo demonstrate IP encapsulation, this section traces a specifically routed frame as it is sent out from

Using Source Routing Bridge Services114060 Rev. A 2-19 Figure 2-12. Structure of an IP-Encapsulated Frame from ES1 to ES2ES2 ES1 0C30 001A 002A

viii 114060 Rev. A Cache Lookup ...3-8Cache A

Configuring Bridging Services2-20 114060 Rev. AExample B: Between the first and last bridges to receive the SRFBay Networks Bridge B receives the frame

Using Source Routing Bridge Services114060 Rev. A 2-21 IP Encapsulation GuidelinesWhen using IP encapsulation, the following guidelines apply:• Do not

Configuring Bridging Services2-22 114060 Rev. ATo select proprietary or standard encapsulation, use the Encapsulation Format parameter as described in

Using Source Routing Bridge Services114060 Rev. A 2-23 • Assign to third-party routers bridge IDs that differ from Bay Networks source routing bridge

Configuring Bridging Services2-24 114060 Rev. AInternal LAN IDThe internal LAN ID is a source routing designator that identifies the virtual LAN on whi

Using Source Routing Bridge Services114060 Rev. A 2-25 • Specify a ring ID for the backbone IP network to which the source routing interface connects.

Configuring Bridging Services2-26 114060 Rev. AFor each source routing parameter, this section provides information about default settings, valid para

Using Source Routing Bridge Services114060 Rev. A 2-27 Figure 2-14. Edit Source Routing Global Parameters Window Parameter: SR Bridge Internal LAN ID

Configuring Bridging Services2-28 114060 Rev. A Parameter: SR Bridge ID Default: 0x0 Range: 0x1 to 0xf Function: Specifies this bridge’s bridge ID and

Using Source Routing Bridge Services114060 Rev. A 2-29 Figure 2-15. SR Interface List Window Parameter: Source Routing Ring Number Default: 0x0 Range:

114060 Rev. A ixImplementation Notes ...4-7Protocol

Configuring Bridging Services2-30 114060 Rev. AEnabling Source Routing Spanning Tree Service on an InterfaceTo enable source routing spanning tree on

Using Source Routing Bridge Services114060 Rev. A 2-31 5.Click on Cancel to enable default spanning tree service and to display the next protocol-spec

Configuring Bridging Services2-32 114060 Rev. A Parameter: Bridge Priority Default: 128 Range: 0 to 65535 Function: Combined with the Bridge MAC Addre

Using Source Routing Bridge Services114060 Rev. A 2-33 Editing Source Routing ParametersOnce you configure a circuit to support source routing, you use

Configuring Bridging Services2-34 114060 Rev. AFigure 2-18. Edit Source Routing Global Parameters Window2.Edit the parameters, using the descriptions

Using Source Routing Bridge Services114060 Rev. A 2-35 Parameter: Enable Default: Enable Options: Enable | Disable Function: Enables or disables sou

Configuring Bridging Services2-36 114060 Rev. A Parameter: SR Bridge ID Default: 0x0 Range: 0x1 to 0xf Function: Specifies this bridge’s bridge ID and

Using Source Routing Bridge Services114060 Rev. A 2-37 Parameter: IP Encapsulation Default: Disable Options: Enable | Disable Function: Enables IP en

Configuring Bridging Services2-38 114060 Rev. A Parameter: IP MTU Size (bytes) Default: 4562 Range: 0 to 4562 Function: Specifies the maximum MTU size

Using Source Routing Bridge Services114060 Rev. A 2-39 Figure 2-19. SR Interface List Window2. Select the interface you want to edit.3. Edit the param