Users Guide

Table Of Contents
Conguring BGP Fast Fall-Over.............................................................................................................................210
Conguring Passive Peering.................................................................................................................................... 211
Maintaining Existing AS Numbers During an AS Migration................................................................................. 212
Allowing an AS Number to Appear in its Own AS Path....................................................................................... 213
Enabling Graceful Restart........................................................................................................................................214
Filtering on an AS-Path Attribute........................................................................................................................... 215
Regular Expressions as Filters.................................................................................................................................216
Redistributing Routes...............................................................................................................................................217
Enabling Additional Paths........................................................................................................................................ 218
Conguring IP Community Lists............................................................................................................................. 218
Conguring an IP Extended Community List........................................................................................................219
Filtering Routes with Community Lists................................................................................................................. 220
Manipulating the COMMUNITY Attribute.............................................................................................................221
Changing MED Attributes.......................................................................................................................................222
Changing the LOCAL_PREFERENCE Attribute..................................................................................................223
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes.............223
Changing the WEIGHT Attribute........................................................................................................................... 224
Enabling Multipath...................................................................................................................................................224
Route Reectors......................................................................................................................................................225
Conguring BGP Confederations.......................................................................................................................... 226
Enabling Route Flap Dampening............................................................................................................................ 226
Changing BGP Timers.............................................................................................................................................229
Setting the extended timer.................................................................................................................................... 229
Enabling or disabling BGP neighbors.....................................................................................................................230
Route Map Continue................................................................................................................................................ 231
Enabling MBGP Congurations....................................................................................................................................232
MBGP support for IPv6................................................................................................................................................232
Conguring IPv6 MBGP between peers.....................................................................................................................232
Example-Conguring IPv4 and IPv6 neighbors......................................................................................................... 233
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor............................................... 235
BGP Regular Expression Optimization........................................................................................................................ 237
Debugging BGP..............................................................................................................................................................237
Storing Last and Bad PDUs....................................................................................................................................238
Capturing PDUs....................................................................................................................................................... 239
PDU Counters.......................................................................................................................................................... 240
10 Content Addressable Memory (CAM)....................................................................................................... 241
CAM Allocation............................................................................................................................................................... 241
Test CAM Usage............................................................................................................................................................ 243
View CAM-ACL Settings.............................................................................................................................................. 243
View CAM Usage...........................................................................................................................................................245
Conguring CAM Threshold and Silence Period........................................................................................................245
Setting CAM Threshold and Silence Period......................................................................................................... 245
CAM Optimization......................................................................................................................................................... 246
Troubleshoot CAM Proling..........................................................................................................................................246
QoS CAM Region Limitation...................................................................................................................................246
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