Setup Guide

Table Of Contents
Enabling four-byte autonomous system numbers..............................................................................................172
Changing a BGP router ID........................................................................................................................................173
Configuring AS4 Number Representations..........................................................................................................173
Configuring a BGP peer............................................................................................................................................174
Example-Configuring BGP routing between peers............................................................................................ 175
BGP peer group..........................................................................................................................................................176
Advanced BGP configuration tasks.............................................................................................................................183
Route-refresh and Soft-reconfiguration.............................................................................................................. 183
Aggregating Routes...................................................................................................................................................185
Filtering BGP............................................................................................................................................................... 187
Configuring BGP Fast Fall-Over.............................................................................................................................192
Configuring Passive Peering................................................................................................................................... 194
Enabling Graceful Restart........................................................................................................................................194
Redistributing Routes............................................................................................................................................... 195
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.....................................................................................................................................207
Enabling or disabling BGP neighbors.................................................................................................................... 207
Route Map Continue................................................................................................................................................ 208
Configuring BGP Confederations..........................................................................................................................209
Configuring a BGP VRF address family............................................................................................................... 209
Maintaining Existing AS Numbers During an AS Migration.............................................................................. 211
Allowing an AS Number to Appear in its Own AS Path..................................................................................... 211
Enabling MBGP Configurations.............................................................................................................................. 212
MBGP support for IPv6............................................................................................................................................213
Configuring IPv6 MBGP between peers.............................................................................................................. 213
Example-Configuring IPv4 and IPv6 neighbors.................................................................................................. 213
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor................................... 215
BGP Regular Expression Optimization..................................................................................................................217
Debugging BGP.......................................................................................................................................................... 217
Chapter 10: Content Addressable Memory (CAM)......................................................................220
CAM Allocation................................................................................................................................................................ 220
Test CAM Usage............................................................................................................................................................. 222
View CAM-ACL Settings...............................................................................................................................................222
View CAM Usage............................................................................................................................................................ 224
Configuring CAM Threshold and Silence Period..................................................................................................... 224
CAM Optimization.......................................................................................................................................................... 225
Troubleshoot CAM Profiling.........................................................................................................................................225
QoS CAM Region Limitation...................................................................................................................................225
Chapter 11: Control Plane Policing (CoPP).................................................................................227
Configure Control Plane Policing................................................................................................................................ 228
Contents
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