Users Guide

Enabling four-byte autonomous system numbers............................................................................................. 183
Changing a BGP router ID....................................................................................................................................... 183
Configuring AS4 Number Representations..........................................................................................................184
Configuring a BGP peer........................................................................................................................................... 185
Example-Configuring BGP routing between peers............................................................................................186
BGP peer group..........................................................................................................................................................187
Advanced BGP configuration tasks.............................................................................................................................193
Route-refresh and Soft-reconfiguration.............................................................................................................. 193
Aggregating Routes...................................................................................................................................................196
Filtering BGP...............................................................................................................................................................198
Configuring BGP Fast Fall-Over............................................................................................................................203
Configuring Passive Peering.................................................................................................................................. 205
Enabling Graceful Restart.......................................................................................................................................205
Redistributing Routes...............................................................................................................................................206
Enabling Additional Paths........................................................................................................................................207
Configuring IP Community Lists............................................................................................................................208
Configuring an IP Extended Community List..................................................................................................... 209
Configure BGP attributes........................................................................................................................................ 210
Enabling Multipath..................................................................................................................................................... 213
Route Reflectors........................................................................................................................................................ 214
Enabling Route Flap Dampening.............................................................................................................................215
Changing BGP keepalive and hold timers.............................................................................................................217
Setting the extended timer..................................................................................................................................... 218
Enabling or disabling BGP neighbors.....................................................................................................................218
Route Map Continue................................................................................................................................................ 220
Configuring BGP Confederations..........................................................................................................................220
Configuring a BGP VRF address family................................................................................................................ 221
Maintaining Existing AS Numbers During an AS Migration.............................................................................222
Allowing an AS Number to Appear in its Own AS Path................................................................................... 223
Enabling MBGP Configurations............................................................................................................................. 223
MBGP support for IPv6...........................................................................................................................................224
Configuring IPv6 MBGP between peers..............................................................................................................224
Example-Configuring IPv4 and IPv6 neighbors................................................................................................. 225
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor...................................227
BGP Regular Expression Optimization................................................................................................................. 228
Debugging BGP......................................................................................................................................................... 228
Chapter 10: Content Addressable Memory (CAM)...................................................................... 231
CAM Allocation.................................................................................................................................................................231
Test CAM Usage............................................................................................................................................................. 233
View CAM-ACL Settings...............................................................................................................................................233
View CAM Usage............................................................................................................................................................ 234
Configuring CAM Threshold and Silence Period..................................................................................................... 235
CAM Optimization...........................................................................................................................................................236
Troubleshoot CAM Profiling......................................................................................................................................... 236
QoS CAM Region Limitation...................................................................................................................................236
Syslog Error When the Table is Full...................................................................................................................... 237
Syslog Warning Upon 90 Percent Utilization of CAM......................................................................................237
Syslog Warning for Discrepancies Between Configured Extended Prefixes.............................................. 237
Unified Forwarding Table (UFT) Modes....................................................................................................................237
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