
Contents
xii Enterasys Xpedition User Reference Manual
Creating Virtual Links................................................................................................. 136
Configuring Autonomous System External (ASE) Link Advertisements........... 137
Configuring OSPF for Different Types of Interfaces............................................... 137
Monitoring OSPF.................................................................................................................138
OSPF Configuration Examples.......................................................................................... 140
Exporting All Interface & Static Routes to OSPF ...................................... 140
Exporting All RIP, Interface & Static Routes to OSPF.............................. 141
Chapter 14: BGP Configuration Guide...........................................................145
BGP Overview .....................................................................................................................145
The XP BGP Implementation...................................................................................... 146
Basic BGP Tasks................................................................................................................... 146
Setting the Autonomous System Number................................................................ 147
Setting the Router ID...................................................................................................147
Configuring a BGP Peer Group..................................................................................147
Adding and Removing a BGP Peer........................................................................... 149
Starting BGP.................................................................................................................. 149
Using AS-Path Regular Expressions.........................................................................149
AS-Path Regular Expression Examples............................................................. 151
Using the AS Path Prepend Feature.......................................................................... 151
Notes on Using the AS Path Prepend Feature.................................................. 152
BGP Configuration Examples............................................................................................152
BGP Peering Session Example.................................................................................... 153
IBGP Configuration Example..................................................................................... 155
IBGP Routing Group Example............................................................................156
IBGP Internal Group Example............................................................................ 159
EBGP Multihop Configuration Example.................................................................. 162
Community Attribute Example................................................................................. 165
Notes on Using Communities............................................................................. 170
Local Preference Examples......................................................................................... 171
Using the local-pref Option................................................................................. 173
Using the set-pref Option.................................................................................... 173
Multi-Exit Discriminator Attribute Example...........................................................174
EBGP Aggregation Example....................................................................................... 175
Route Reflection Example...........................................................................................176
Notes on Using Route Reflection........................................................................ 179
Chapter 15: Routing Policy Configuration Guide..........................................181
Route Import and Export Policy Overview..................................................................... 181
Preference......................................................................................................................182
Import Policies.............................................................................................................. 183
Import-Source........................................................................................................ 183
Route-Filter............................................................................................................184
Export Policies.............................................................................................................. 184
Export-Destination................................................................................................184
Export-Source........................................................................................................184
Route-Filter............................................................................................................185
Specifying a Route Filter............................................................................................. 185
Aggregates and Generates.......................................................................................... 186
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