Users Guide

Allowing an AS Number to Appear in its Own AS Path....................................................................................... 212
Enabling Graceful Restart........................................................................................................................................213
Filtering on an AS-Path Attribute........................................................................................................................... 214
Regular Expressions as Filters.................................................................................................................................215
Redistributing Routes...............................................................................................................................................216
Enabling Additional Paths........................................................................................................................................ 217
Conguring IP Community Lists............................................................................................................................. 217
Conguring an IP Extended Community List........................................................................................................218
Filtering Routes with Community Lists..................................................................................................................219
Manipulating the COMMUNITY Attribute............................................................................................................220
Changing MED Attributes....................................................................................................................................... 221
Changing the LOCAL_PREFERENCE Attribute..................................................................................................222
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes.............222
Changing the WEIGHT Attribute........................................................................................................................... 223
Enabling Multipath...................................................................................................................................................223
Route Reectors...................................................................................................................................................... 224
Conguring BGP Confederations.......................................................................................................................... 225
Enabling Route Flap Dampening............................................................................................................................ 225
Changing BGP Timers.............................................................................................................................................228
Setting the extended timer.....................................................................................................................................228
Enabling or disabling BGP neighbors.....................................................................................................................229
Route Map Continue............................................................................................................................................... 230
Enabling MBGP Congurations.................................................................................................................................... 231
MBGP support for IPv6.................................................................................................................................................231
Conguring IPv6 MBGP between peers..................................................................................................................... 231
Example-Conguring IPv4 and IPv6 neighbors......................................................................................................... 232
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor............................................... 234
BGP Regular Expression Optimization........................................................................................................................236
Debugging BGP............................................................................................................................................................. 236
Storing Last and Bad PDUs.................................................................................................................................... 237
Capturing PDUs....................................................................................................................................................... 238
PDU Counters.......................................................................................................................................................... 239
10 Content Addressable Memory (CAM).......................................................................................................240
CAM Allocation...............................................................................................................................................................240
Test CAM Usage............................................................................................................................................................ 242
View CAM-ACL Settings.............................................................................................................................................. 242
View CAM Usage...........................................................................................................................................................244
Conguring CAM Threshold and Silence Period........................................................................................................244
Setting CAM Threshold and Silence Period..........................................................................................................244
CAM Optimization......................................................................................................................................................... 245
Troubleshoot CAM Proling..........................................................................................................................................246
CAM Prole Mismatches........................................................................................................................................ 246
QoS CAM Region Limitation...................................................................................................................................246
11 Control Plane Policing (CoPP).................................................................................................................. 247
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