Administrator Guide

Enabling four-byte autonomous system numbers................................................................................................... 173
Changing a BGP router ID...........................................................................................................................................174
Configuring AS4 Number Representations...............................................................................................................174
Configuring a BGP peer...............................................................................................................................................175
Example-Configuring BGP routing between peers..................................................................................................176
BGP peer group............................................................................................................................................................ 177
Advanced BGP configuration tasks.................................................................................................................................184
Route-refresh and Soft-reconfiguration...................................................................................................................184
Aggregating Routes..................................................................................................................................................... 186
Filtering BGP.................................................................................................................................................................188
Configuring BGP Fast Fall-Over.................................................................................................................................193
Configuring Passive Peering.......................................................................................................................................194
Enabling Graceful Restart........................................................................................................................................... 195
Redistributing Routes.................................................................................................................................................. 196
Enabling Additional Paths............................................................................................................................................196
Configuring IP Community Lists.................................................................................................................................197
Configuring an IP Extended Community List............................................................................................................198
Configure BGP attributes........................................................................................................................................... 199
Enabling Multipath.......................................................................................................................................................202
Route Reflectors......................................................................................................................................................... 203
Enabling Route Flap Dampening................................................................................................................................204
Changing BGP keepalive and hold timers................................................................................................................ 206
Setting the extended timer........................................................................................................................................206
Enabling or disabling BGP neighbors.........................................................................................................................207
Route Map Continue...................................................................................................................................................208
Configuring BGP Confederations..............................................................................................................................208
Configuring a BGP VRF address family....................................................................................................................209
Maintaining Existing AS Numbers During an AS Migration.....................................................................................210
Allowing an AS Number to Appear in its Own AS Path........................................................................................... 211
Enabling MBGP Configurations..................................................................................................................................212
MBGP support for IPv6...............................................................................................................................................212
Configuring IPv6 MBGP between peers...................................................................................................................212
Example-Configuring IPv4 and IPv6 neighbors........................................................................................................213
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor............................................. 215
BGP Regular Expression Optimization...................................................................................................................... 216
Debugging BGP............................................................................................................................................................ 217
10 Content Addressable Memory (CAM)........................................................................................ 219
CAM Allocation...................................................................................................................................................................219
Test CAM Usage...............................................................................................................................................................220
View CAM Profiles.............................................................................................................................................................221
View CAM-ACL Settings.................................................................................................................................................. 221
View CAM Usage.............................................................................................................................................................. 223
Configuring CAM Threshold and Silence Period........................................................................................................... 223
CAM Optimization.............................................................................................................................................................225
Troubleshoot CAM Profiling............................................................................................................................................ 225
QoS CAM Region Limitation...................................................................................................................................... 225
Syslog Error When the Table is Full.......................................................................................................................... 225
Syslog Warning Upon 90 Percent Utilization of CAM............................................................................................225
Syslog Warning for Discrepancies Between Configured Extended Prefixes.......................................................225
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