Reference Guide

AS4 Number Representation...................................................................................................... 164
AS Number Migration..................................................................................................................165
BGP4 Management Information Base (MIB)...............................................................................167
Important Points to Remember..................................................................................................167
Configuration Information................................................................................................................168
BGP Configuration............................................................................................................................168
Enabling BGP...............................................................................................................................169
Configuring AS4 Number Representations................................................................................ 173
Configuring Peer Groups............................................................................................................ 175
Configuring BGP Fast Fall-Over..................................................................................................178
Configuring Passive Peering.......................................................................................................180
Maintaining Existing AS Numbers During an AS Migration........................................................180
Allowing an AS Number to Appear in its Own AS Path.............................................................. 181
Enabling Graceful Restart............................................................................................................182
Enabling Neighbor Graceful Restart...........................................................................................183
Filtering on an AS-Path Attribute................................................................................................184
Regular Expressions as Filters..................................................................................................... 185
Redistributing Routes.................................................................................................................. 187
Enabling Additional Paths........................................................................................................... 188
Configuring IP Community Lists.................................................................................................188
Configuring an IP Extended Community List............................................................................ 190
Filtering Routes with Community Lists....................................................................................... 191
Manipulating the COMMUNITY Attribute................................................................................... 191
Changing MED Attributes............................................................................................................193
Changing the LOCAL_PREFERENCE Attribute...........................................................................193
Changing the NEXT_HOP Attribute........................................................................................... 194
Changing the WEIGHT Attribute.................................................................................................195
Enabling Multipath.......................................................................................................................195
Filtering BGP Routes....................................................................................................................195
Filtering BGP Routes Using Route Maps.....................................................................................197
Filtering BGP Routes Using AS-PATH Information.................................................................... 198
Configuring BGP Route Reflectors.............................................................................................198
Aggregating Routes.....................................................................................................................199
Configuring BGP Confederations.............................................................................................. 200
Enabling Route Flap Dampening............................................................................................... 200
Changing BGP Timers................................................................................................................ 203
Enabling BGP Neighbor Soft-Reconfiguration..........................................................................203
Route Map Continue...................................................................................................................205
Enabling MBGP Configurations........................................................................................................205
BGP Regular Expression Optimization............................................................................................ 206
Debugging BGP................................................................................................................................ 206
Storing Last and Bad PDUs......................................................................................................... 207