White Papers

Table Of Contents
Advanced BGP configuration tasks.............................................................................................................................189
Route-refresh and Soft-reconfiguration..............................................................................................................189
Aggregating Routes...................................................................................................................................................192
Filtering BGP...............................................................................................................................................................194
Configuring BGP Fast Fall-Over.............................................................................................................................199
Configuring Passive Peering.................................................................................................................................. 200
Enabling Graceful Restart........................................................................................................................................201
Redistributing Routes...............................................................................................................................................202
Enabling Additional Paths........................................................................................................................................203
Configuring IP Community Lists............................................................................................................................203
Configuring an IP Extended Community List..................................................................................................... 204
Configure BGP attributes....................................................................................................................................... 205
Enabling Multipath.................................................................................................................................................... 209
Route Reflectors....................................................................................................................................................... 209
Enabling Route Flap Dampening..............................................................................................................................211
Changing BGP keepalive and hold timers............................................................................................................ 213
Setting the extended timer..................................................................................................................................... 213
Enabling or disabling BGP neighbors.....................................................................................................................214
Route Map Continue................................................................................................................................................. 215
Configuring BGP Confederations...........................................................................................................................216
Configuring a BGP VRF address family................................................................................................................ 216
Maintaining Existing AS Numbers During an AS Migration..............................................................................217
Allowing an AS Number to Appear in its Own AS Path.................................................................................... 218
Enabling MBGP Configurations.............................................................................................................................. 219
MBGP support for IPv6............................................................................................................................................219
Configuring IPv6 MBGP between peers.............................................................................................................. 219
Example-Configuring IPv4 and IPv6 neighbors................................................................................................. 220
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor...................................222
BGP Regular Expression Optimization................................................................................................................. 224
Debugging BGP......................................................................................................................................................... 224
Chapter 10: Content Addressable Memory (CAM)......................................................................226
CAM Allocation................................................................................................................................................................ 226
Test CAM Usage............................................................................................................................................................. 228
View CAM-ACL Settings...............................................................................................................................................228
View CAM Usage............................................................................................................................................................ 229
CAM Optimization.......................................................................................................................................................... 230
Troubleshoot CAM Profiling.........................................................................................................................................230
QoS CAM Region Limitation...................................................................................................................................230
Syslog Error When the Table is Full.......................................................................................................................231
Syslog Warning Upon 90 Percent Utilization of CAM...................................................................................... 231
Syslog Warning for Discrepancies Between Configured Extended Prefixes...............................................231
Unified Forwarding Table (UFT) Modes.....................................................................................................................231
Configuring UFT Modes........................................................................................................................................... 231
Chapter 11: Control Plane Policing (CoPP)................................................................................ 233
Configure Control Plane Policing................................................................................................................................ 234
Configuring CoPP for Protocols............................................................................................................................235
Configuring CoPP for CPU Queues......................................................................................................................236
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