Avaya Configuring Bridging Services User manual

Part No. 117351-A Rev. A

September 1997

BayRS Version 12.00

Site Manager Software Version 6.00

Conﬁguring Bridging

Services

ii

117351-A Rev. A

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117351-A Rev. A

v

Contents

About This Guide

Before you Begin ............................................................................................................xvii

Conventions ...................................................................................................................xviii

Acronyms .........................................................................................................................xix

Ordering Bay Networks Publications ............................................................................... xx

Bay Networks Customer Service .....................................................................................xxi

How to Get Help ..............................................................................................................xxi

Chapter 1

Using Transparent Bridge Services

Transparent Bridge Overview .........................................................................................1-1

How the Bridge Works ..............................................................................................1-2

The Translation Process ...........................................................................................1-3

Spanning Tree Algorithm ..........................................................................................1-8

Filtering Frames .....................................................................................................1-15

Enabling Bridge Service ...............................................................................................1-15

Enabling Bridge Service on an Interface ................................................................1-15

Enabling Spanning Tree on an Interface ................................................................1-16

Editing Bridge Parameters ............................................................................................1-18

Editing Bridge Global Parameters ..........................................................................1-20

Bridge Global Parameter Descriptions ...................................................................1-20

Editing Bridge Interface Parameters ......................................................................1-22

Bridge Interface Parameter Descriptions ...............................................................1-23

Editing Spanning Tree Global Parameters .............................................................1-24

Spanning Tree Global Parameter Descriptions ......................................................1-25

Editing Spanning Tree Interface Parameters ..........................................................1-30

Spanning Tree Interface Parameter Descriptions ...................................................1-31

Flushing the Forwarding Table ...............................................................................1-32

Deleting the Bridge and Spanning Tree from the Router ..............................................1-33

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Chapter 2

Using Source Routing Bridge Services

Source Routing Overview ...............................................................................................2-1

How Source Routing Differs from Transparent Bridging ...........................................2-2

How End Stations on a Source Routing Network Discover Routes .........................2-2

All-Paths Broadcast Routing ..............................................................................2-2

Spanning Tree Broadcast Routing .....................................................................2-3

Speciﬁc Routing .................................................................................................2-4

Source Routing over IP Networks ............................................................................2-4

How IP Encapsulation Works ...................................................................................2-5

IP Encapsulation Features .......................................................................................2-8

Source Route End Station Support ..........................................................................2-9

How the Bay Networks Source Routing Bridge Works .................................................2-10

Source Routing across a Token Ring Network .......................................................2-11

How the Source Routing Bridge Handles Explorer Frames .............................2-12

How the Source Routing Bridge Handles Speciﬁcally Routed Frames ...........2-14

Source Routing across an IP Network ...................................................................2-17

IP Encapsulation Guidelines ..................................................................................2-20

Source Routing over Frame Relay Networks .........................................................2-21

Source Routing over FDDI .....................................................................................2-21

For More Information about Source Routing ................................................................2-22

Implementation Notes ...................................................................................................2-22

Assigning Bridge IDs, Internal LAN IDs, and Group LAN IDs ................................2-22

Bridge ID ..........................................................................................................2-22

Internal LAN ID ................................................................................................2-24

Group LAN ID ..................................................................................................2-24

Conﬁguring IP Encapsulation Support ...................................................................2-24

Enabling Source Routing Services ...............................................................................2-25

Enabling Source Routing Services on an Interface ................................................2-26

Enabling Source Routing Spanning Tree Service on an Interface .........................2-30

Editing Source Routing Parameters .............................................................................2-33

Editing Source Routing Global Parameters ...........................................................2-34

Source Routing Global Parameter Descriptions ....................................................2-35

Editing Source Routing Interface Parameters ........................................................2-38

Source Routing Interface Parameter Descriptions .................................................2-40

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vii

Adding or Deleting a Bridge ID on the Bridge Entry List ........................................2-45

Adding a Bridge ID to the Bridge Entry List .....................................................2-45

Source Routing Bridge ID Parameter Description ...........................................2-47

Deleting a Bridge ID from the Bridge Entry List ...............................................2-47

Adding or Deleting an IP Address on the IP Explorer Address List .......................2-48

Adding an IP Explorer Address to the IP Explorer Address List ......................2-48

IP Explorer Address Parameter Description ....................................................2-49

Deleting an IP Explorer Address .....................................................................2-50

Editing Source Route Spanning Tree Global Parameters ......................................2-50

Source Route Spanning Tree Global Parameter Descriptions ...............................2-51

Editing Source Route Spanning Tree Interface Parameters ...................................2-56

Source Route Spanning Tree Interface Parameter Descriptions ............................2-57

Deleting Source Routing from the Router .....................................................................2-58

Chapter 3

Using NetBIOS Services

NetBIOS Overview .........................................................................................................3-1

NetBIOS Names .......................................................................................................3-1

Registering Station Names ......................................................................................3-2

Establishing Sessions ..............................................................................................3-3

Sessionless Communication ....................................................................................3-4

Broadcast Reduction ................................................................................................3-4

Name Caching ...................................................................................................3-5

Client Name Caching .........................................................................................3-5

Server Name Caching .......................................................................................3-6

Datagram RIF Caching ......................................................................................3-6

Query Caching ...................................................................................................3-7

Cache Lookup ..........................................................................................................3-8

Cache Aging .............................................................................................................3-8

Statically Conﬁgured NetBIOS Names .....................................................................3-9

Implementation Notes .....................................................................................................3-9

Topologies ................................................................................................................3-9

Spanning Tree Topology ....................................................................................3-9

Other Topologies ..............................................................................................3-10

NetBIOS Caches ....................................................................................................3-10

Enabling NetBIOS Services ..........................................................................................3-11

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Editing NetBIOS Parameters ........................................................................................3-11

Editing NetBIOS Global Parameters ......................................................................3-13

NetBIOS Global Parameter Descriptions ...............................................................3-14

Editing NetBIOS Interface Parameters ...................................................................3-20

NetBIOS Interface Parameter Descriptions ............................................................3-21

Using Statically Conﬁgured NetBIOS Clients and Servers ....................................3-23

Adding a Statically Conﬁgured NetBIOS Client or Server ...............................3-23

Static Name Parameter Descriptions ...............................................................3-24

Editing Statically Conﬁgured NetBIOS Clients and Servers ............................3-26

NetBIOS Static List Parameter Descriptions ...................................................3-26

Deleting a Statically Conﬁgured NetBIOS Name .............................................3-28

Chapter 4

Using Translation Bridge Services

Translation Bridge Overview ...........................................................................................4-1

Databases ................................................................................................................4-2

Forwarding Database ........................................................................................4-2

Route Information Field Database .....................................................................4-2

Database Aging Mechanism ..............................................................................4-2

Bridge Operations ....................................................................................................4-3

SR Operations ...................................................................................................4-3

TB Operations ...................................................................................................4-4

TB to SR Challenges ................................................................................................4-5

Frame Format Selection ....................................................................................4-6

Frame Lengths ...................................................................................................4-6

MAC Address Formats ......................................................................................4-6

LAN Speeds ......................................................................................................4-6

Implementation Notes .....................................................................................................4-7

Protocols Supported ................................................................................................4-7

Interfaces Supported ................................................................................................4-7

Loop-Free Operation ................................................................................................4-8

Physically Disabling Loops ................................................................................4-8

Using the Spanning Tree Protocol .....................................................................4-9

Procedure for Conﬁguring the Translation Bridge on Your Network .......................4-11

Enabling Source Routing Translate/LB Service ......................................................4-12

Creating the Translation Bridge ....................................................................................4-14

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ix

Editing Translation Bridge Parameters ..........................................................................4-15

Editing Translation Bridge Global Parameters ........................................................4-15

Translation Bridge Global Parameter Descriptions ................................................4-16

Editing Translation Bridge MAC Address Conversions ...........................................4-21

Adding an Address Mapping ...........................................................................4-21

Translation Bridge Address Mapping Parameter Descriptions ........................4-23

Deleting an Address Mapping .........................................................................4-23

Editing Translation Bridge Station Type ..................................................................4-24

Adding a New Address to the Station List .......................................................4-24

Translation Bridge Ethernet Address Mapping Parameter Descriptions ..........4-25

Deleting a Station ............................................................................................4-26

Deleting the Translation Bridge from the Router ...........................................................4-26

Chapter 5

Using Native Mode LAN Services

Native Mode LAN Overview ............................................................................................5-1

Deﬁning a Closed User Group ........................................................................................5-3

Implementation Notes .....................................................................................................5-4

Deﬁning a Closed User Group That Permits

Overlapping Network Trafﬁc .....................................................................................5-4

Controlling NML Trafﬁc on a Network Trunk .............................................................5-4

Enabling NML Services ..................................................................................................5-5

Editing NML Parameters .................................................................................................5-6

Editing NML Interface Parameters ...........................................................................5-8

NML Interface Parameter Descriptions ....................................................................5-9

Assigning an Access List to a Port ...............................................................................5-12

NML Add Security Range Parameters ...................................................................5-14

Enabling Ranges ....................................................................................................5-15

NML Range Enable Parameter Description ...........................................................5-17

Deleting NML from the Router ......................................................................................5-17

Appendix A

Site Manager Default Settings

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Appendix B

Components of a Source Route Frame

802.5 Physical Header .................................................................................................. B-1

Routing Information Field (RIF) ..................................................................................... B-2

Routing Control ....................................................................................................... B-2

Type of Frame ................................................................................................... B-3

Length ............................................................................................................... B-3

Direction Bit ...................................................................................................... B-3

Frame Size Bits ................................................................................................ B-3

Routing Designators ................................................................................................ B-4

Index

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xi

Figures

Figure 1-1. Forwarding Table Update .........................................................................1-2

Figure 1-2. RFC 1042 Encapsulation .........................................................................1-4

Figure 1-3. Bridge Tunnel Service Encapsulation ......................................................1-4

Figure 1-4. Ethernet to FDDI Translation ....................................................................1-5

Figure 1-5. FDDI to Ethernet Translation ....................................................................1-6

Figure 1-6. Ethernet/802.3 to FDDI Translation ..........................................................1-7

Figure 1-7. AppleTalk ARP (Originating on FDDI) to 802.3 Translation ......................1-8

Figure 1-8. Parallel Bridge Topology ..........................................................................1-9

Figure 1-9. Root Port Determination (Equal Path Costs) .........................................1-11

Figure 1-10. Root Port Determination (Equal Path Costs and Root Interface

Priorities) ................................................................................................1-12

Figure 1-11. Spanning Tree (Loop-Free) Logical Topology ........................................1-13

Figure 1-12. Inefﬁcient Spanning Tree Topology ........................................................1-14

Figure 1-13. Spanning Tree Autoconﬁguration Window .............................................1-17

Figure 1-14. Conﬁguration Manager Window .............................................................1-19

Figure 1-15. Edit Bridge Global Parameters Window .................................................1-20

Figure 1-16. Bridge Interfaces Window ......................................................................1-23

Figure 1-17. Edit Spanning Tree Global Parameters Window ....................................1-25

Figure 1-18. Spanning Tree Interfaces Window ..........................................................1-30

Figure 2-1. Source Routing Network ..........................................................................2-1

Figure 2-2. Source Routing Designator ......................................................................2-3

Figure 2-3. Route Discovery .......................................................................................2-4

Figure 2-4. Source Routing over an IP Network .........................................................2-6

Figure 2-5. Examining the RIF Field of an SRF .........................................................2-7

Figure 2-6. IP Routers Source Routing across a Token Ring Network .....................2-10

Figure 2-7. Tracking an Explorer Frame ...................................................................2-11

Figure 2-8. Structure of an Explorer Frame ..............................................................2-13

Figure 2-9. Tracking a Speciﬁcally Routed Frame from ES2 to ES1 ........................2-14

Figure 2-10. Structure of a Speciﬁcally Routed Frame from ES2 to ES1 ...................2-16

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Figure 2-11. Tracking an IP-Encapsulated Frame from ES1 to ES2 ..........................2-17

Figure 2-12. Structure of an IP-Encapsulated Frame from ES1 to ES2 .....................2-19

Figure 2-13. Parallel Operation ..................................................................................2-23

Figure 2-14. Edit Source Routing Global Parameters Window ..................................2-27

Figure 2-15. SR Interface List Window .......................................................................2-29

Figure 2-16. Source Route Spanning Tree Autoconﬁguration Window ......................2-31

Figure 2-17. Conﬁguration Manager Window .............................................................2-33

Figure 2-18. Edit Source Routing Global Parameters Window ..................................2-34

Figure 2-19. SR Interface List Window .......................................................................2-39

Figure 2-20. Source Routing Bridge IDs Window .......................................................2-46

Figure 2-21. Add Bridge ID Window ...........................................................................2-46

Figure 2-22. Source Routing Bridge IP Explorer Addresses Window ........................2-48

Figure 2-23. Add Source Routing Explorer IP Address Window ................................2-49

Figure 2-24. Edit Source Route Spanning Tree Global Parameters Window .............2-51

Figure 2-25. Source Route Spanning Tree Interface List Window ..............................2-56

Figure 3-1. Conﬁguration Manager Window .............................................................3-12

Figure 3-2. Edit Source Routing Global Parameters Window ..................................3-13

Figure 3-3. SR Interface List Window .......................................................................3-20

Figure 3-4. NetBIOS Static List Window ...................................................................3-23

Figure 3-5. NetBIOS Window ...................................................................................3-24

Figure 4-1. Network Conﬁguration with Potential Loop ..............................................4-8

Figure 4-2. Spanning Tree with Translation Bridging ................................................4-10

Figure 4-3. Edit Translation Bridge Global Parameters Window ...............................4-13

Figure 4-4. Conﬁguration Manager Window .............................................................4-14

Figure 4-5. Edit Translation Bridge Global Parameters Window ...............................4-16

Figure 4-6. Address Mapping List Window ...............................................................4-22

Figure 4-7. Translation Bridge Address Mapping Window ........................................4-22

Figure 4-8. Ethernet Station Type List Window ........................................................4-24

Figure 4-9. Translation Bridge Address Mapping Window ........................................4-25

Figure 5-1. NML Closed User Groups ........................................................................5-2

Figure 5-2. Edit NML Interface Window ......................................................................5-6

Figure 5-3. Conﬁguration Manager Window ...............................................................5-7

Figure 5-4. NML Interfaces Window ...........................................................................5-8

Figure 5-5. NML Filters Window ...............................................................................5-12

Figure 5-6. NML Add Security Range Window .........................................................5-13

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Figure 5-7. Circuit List Window .................................................................................5-15

Figure 5-8. Circuit Deﬁnition Window .......................................................................5-16

Figure B-1. Fields in a Source Route Frame ............................................................. B-1

Figure B-2. Components of the RIF ........................................................................... B-2

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Tables

Table A-1. Transparent Bridge Global Parameters ................................................... A-1

Table A-2. Transparent Bridge Interface Parameters ............................................... A-2

Table A-3. Spanning Tree Global Parameters .......................................................... A-2

Table A-4. Spanning Tree Interface Parameters ....................................................... A-3

Table A-5. Source Routing Global Parameters ........................................................ A-4

Table A-6. Source Routing Interface Parameters ..................................................... A-5

Table A-7. Source Routing Bridge ID Parameter ..................................................... A-5

Table A-8. IP Explorer Address Parameter .............................................................. A-5

Table A-9. Source Route Spanning Tree Global Parameters ................................... A-6

Table A-10. Source Route Spanning Tree Interface Parameters ................................ A-6

Table A-11. NetBIOS Global Parameters ................................................................... A-7

Table A-12. NetBIOS Interface Parameters ............................................................... A-7

Table A-13. NetBIOS Static Name Parameters .......................................................... A-8

Table A-14. Translation Bridge Global Parameters .................................................... A-8

Table A-15. Translation Bridge Address Mapping Parameters ................................... A-8

Table A-16. Translation Bridge Ethernet Address Mapping Parameters .................... A-9

Table A-17. NML Interface Parameters ...................................................................... A-9

Table A-18. NML Add Security Range Parameters .................................................... A-9

Table A-19. NML Range Enable Parameters ............................................................. A-9

Table B-1. Frame Size Bits ....................................................................................... B-3

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xvii

About This Guide

If you are responsible for conﬁguring bridging services, you need to read this

guide.

Before you Begin

Before using this guide, you must complete the following procedures. For a new

router:

• Install the router (refer to the installation manual that came with your router).

• Connect the router to the network and create a pilot conﬁguration ﬁle (refer to

Quick-Starting Routers

,

Conﬁguring BayStack Remote Access

, or

Connecting

ASN Routers to a Network)

.

If you want to Go to

Learn about transparent bridging services and how to enable bridging

services and spanning tree on an interface

Chapter

1

Learn about source route bridging and how to enable and conﬁgure

source route bridging

Chapter 2

Learn about and customize NetBIOS services Chapter 3

Learn about the transparent-to-source routing translation bridge and

how to conﬁgure it on your router

Chapter 4

Use native mode LAN services to deﬁne closed user groups within a

shared bridging environment

Chapter 5

Obtain the default settings for Site Manager parameters (you can also

obtain this information using Site Manager online Help)

Appendix A

Obtain information about the components of a source route frame Appendix B

Configuring Bridging Services

xviii

117351-A Rev. A

Make sure that you are running the latest version of Bay Networks Site Manager

and router software. For instructions, refer to

Upgrading Routers from Version

7–11.xx to Version 12.00

.

Conventions

angle brackets (< >) Indicate that you choose the text to enter based on the

description inside the brackets. Do not type the

brackets when entering the command.

Example: if command syntax is

ping

<ip_address>

,

you enter

ping 192.32.10.12

bold text

Indicates text that you need to enter, command names,

and buttons in menu paths.

Example: Enter

wfsm &

Example: Use the

dinfo

command.

Example: ATM DXI > Interfaces >

PVCs

identiﬁes the

PVCs button in the window that appears when you

select the Interfaces option from the ATM DXI menu.

brackets ([ ]) Indicate optional elements. You can choose none, one,

or all of the options.

ellipsis points Horizontal (. . .) and vertical ellipsis points indicate

omitted information.

italic text

Indicates variable values in command syntax

descriptions, new terms, ﬁle and directory names, and

book titles.

quotation marks (“ ”) Indicate the title of a chapter or section within a book.

screen text

Indicates data that appears on the screen.

Example:

Set Bay Networks Trap Monitor Filters

separator ( > ) Separates menu and option names in instructions and

internal pin-to-pin wire connections.

Example: Protocols > AppleTalk identiﬁes the

AppleTalk option in the Protocols menu.

Example: Pin 7 > 19 > 20

.

()

About This Guide

117351-A Rev. A

xix

vertical line (

|

) Indicates that you enter only one of the parts of the

command. The vertical line separates choices. Do not

type the vertical line when entering the command.

Example: If the command syntax is

show at routes

|

nets

,

you enter either

show at routes

or

show at nets

, but not both.

Acronyms

APE All-Paths Explorer (frame)

ARE All-Routes Explorer (frame)

ARP Address Resolution Protocol

BPDU Bridge Protocol Data Unit

CTL control

CUGID closed user group ID

DA destination address

DLCI data link connection identiﬁer

DLSw data link switching

DSAP destination service access point

FCS frame check sequence

FDDI Fiber Distributed Data Interface

IEEE Institute of Electrical and Electronic Engineers

IP Internet Protocol

IPX Internet Packet Exchange

LAN local area network

LEN length

LLC Logical Link Control

LNM LAN Network Manager

MAC media access control

MIB management information base

MTU maximum transmission unit

NetBIOS Network Basic Input/Output System

NML Native Mode LAN

OUI organizationally unique identiﬁer

Configuring Bridging Services

xx

117351-A Rev. A

PPP Point-to-Point Protocol

RFC Request for Comments

RIF routing information ﬁeld

SA source address

SAP service access point

SMDS Switched Multimegabit Data Service

SNAP Subnetwork Access Protocol

SR source routing

SRB source route bridge

SRF speciﬁcally routed frame

SSAP session service access point

STE spanning tree explorer frame

TB transparent bridge

XB translation bridge

XNS Xerox Networking System

Ordering Bay Networks Publications

To purchase additional copies of this document or other Bay Networks

publications, order by part number from Bay Networks Press

™

at the following

numbers:

• Phone--U.S./Canada: 888-422-9773

• Phone--International: 510-490-4752

• FAX--U.S./Canada and International: 510-498-2609

The Bay Networks Press catalog is available on the World Wide Web at

support.baynetworks.com/Library/GenMisc

. Bay Networks publications are

available on the World Wide Web at

support.baynetworks.com/Library/tpubs

.

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