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AS Number Migration..................................................................................................................192
BGP4 Management Information Base (MIB).............................................................................. 194
Important Points to Remember..................................................................................................194
Configuration Information................................................................................................................195
BGP Configuration............................................................................................................................ 195
Enabling BGP...............................................................................................................................196
Configuring AS4 Number Representations............................................................................... 200
Configuring Peer Groups............................................................................................................201
Configuring BGP Fast Fail-Over.................................................................................................204
Configuring Passive Peering.......................................................................................................206
Maintaining Existing AS Numbers During an AS Migration........................................................207
Allowing an AS Number to Appear in its Own AS Path............................................................. 208
Enabling Neighbor Graceful Restart.......................................................................................... 208
Filtering on an AS-Path Attribute............................................................................................... 209
Regular Expressions as Filters......................................................................................................211
Redistributing Routes.................................................................................................................. 212
Enabling Additional Paths............................................................................................................213
Configuring IP Community Lists.................................................................................................213
Configuring an IP Extended Community List.............................................................................215
Filtering Routes with Community Lists.......................................................................................216
Manipulating the COMMUNITY Attribute...................................................................................216
Changing MED Attributes............................................................................................................218
Changing the LOCAL_PREFERENCE Attribute...........................................................................218
Changing the NEXT_HOP Attribute............................................................................................219
Changing the WEIGHT Attribute................................................................................................ 220
Enabling Multipath...................................................................................................................... 220
Filtering BGP Routes...................................................................................................................220
Filtering BGP Routes Using Route Maps.................................................................................... 222
Filtering BGP Routes Using AS-PATH Information....................................................................222
Configuring BGP Route Reflectors.............................................................................................223
Aggregating Routes.................................................................................................................... 224
Configuring BGP Confederations.............................................................................................. 224
Enabling Route Flap Dampening................................................................................................225
Changing BGP Timers.................................................................................................................228
Enabling BGP Neighbor Soft-Reconfiguration..........................................................................228
Route Map Continue...................................................................................................................229
Enabling MBGP Configurations........................................................................................................230
BGP Regular Expression Optimization............................................................................................. 231
Debugging BGP.................................................................................................................................231
Storing Last and Bad PDUs......................................................................................................... 232
Capturing PDUs...........................................................................................................................233
PDU Counters............................................................................................................................. 234
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