Users Guide

Conguring a BGP VRF address family................................................................................................................ 204
Route-refresh and Soft-reconguration...............................................................................................................205
Aggregating Routes.................................................................................................................................................208
Filtering BGP Routes...............................................................................................................................................209
Filtering BGP Routes Using Route Maps...............................................................................................................210
Filtering BGP Routes Using AS-PATH Information............................................................................................... 211
Conguring Peer Groups......................................................................................................................................... 212
Conguring BGP Fast Fall-Over............................................................................................................................ 220
Conguring Passive Peering................................................................................................................................... 221
Maintaining Existing AS Numbers During an AS Migration................................................................................ 222
Allowing an AS Number to Appear in its Own AS Path.......................................................................................223
Enabling Graceful Restart.......................................................................................................................................224
Filtering on an AS-Path Attribute.......................................................................................................................... 225
Regular Expressions as Filters................................................................................................................................226
Redistributing Routes.............................................................................................................................................. 227
Enabling Additional Paths........................................................................................................................................228
Conguring IP Community Lists............................................................................................................................ 228
Conguring an IP Extended Community List....................................................................................................... 229
Filtering Routes with Community Lists................................................................................................................. 230
Manipulating the COMMUNITY Attribute.............................................................................................................231
Changing MED Attributes.......................................................................................................................................232
Changing the LOCAL_PREFERENCE Attribute..................................................................................................233
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes.............233
Changing the WEIGHT Attribute........................................................................................................................... 234
Enabling Multipath...................................................................................................................................................234
Route Reectors......................................................................................................................................................235
Conguring BGP Confederations.......................................................................................................................... 236
Enabling Route Flap Dampening............................................................................................................................ 236
Changing BGP Timers.............................................................................................................................................239
Setting the extended timer.................................................................................................................................... 239
Enabling or disabling BGP neighbors.....................................................................................................................240
Route Map Continue................................................................................................................................................ 241
Enabling MBGP Congurations....................................................................................................................................242
MBGP support for IPv6................................................................................................................................................ 242
Conguring IPv6 MBGP between peers.....................................................................................................................242
Example-Conguring IPv4 and IPv6 neighbors......................................................................................................... 243
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor............................................... 245
BGP Regular Expression Optimization........................................................................................................................ 247
Debugging BGP..............................................................................................................................................................247
Storing Last and Bad PDUs....................................................................................................................................248
Capturing PDUs....................................................................................................................................................... 249
PDU Counters..........................................................................................................................................................250
10 Content Addressable Memory (CAM)....................................................................................................... 251
CAM Allocation............................................................................................................................................................... 251
Test CAM Usage............................................................................................................................................................253
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