Users Guide
Conguring AS4 Number Representations........................................................................................................... 198
Conguring Peer Groups.........................................................................................................................................199
Conguring BGP Fast Fail-Over............................................................................................................................ 202
Conguring Passive Peering...................................................................................................................................203
Maintaining Existing AS Numbers During an AS Migration................................................................................ 204
Allowing an AS Number to Appear in its Own AS Path...................................................................................... 205
Filtering on an AS-Path Attribute.......................................................................................................................... 206
Regular Expressions as Filters................................................................................................................................ 207
Redistributing Routes..............................................................................................................................................208
Enabling Additional Paths....................................................................................................................................... 209
Conguring IP Community Lists............................................................................................................................ 209
Conguring an IP Extended Community List........................................................................................................210
Filtering Routes with Community Lists...................................................................................................................211
Manipulating the COMMUNITY Attribute.............................................................................................................212
Changing MED Attributes....................................................................................................................................... 213
Changing the LOCAL_PREFERENCE Attribute...................................................................................................214
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes............. 214
Changing the WEIGHT Attribute............................................................................................................................215
Enabling Multipath....................................................................................................................................................215
Filtering BGP Routes................................................................................................................................................216
Filtering BGP Routes Using Route Maps...............................................................................................................217
Filtering BGP Routes Using AS-PATH Information.............................................................................................. 218
Conguring BGP Route Reectors........................................................................................................................ 218
Aggregating Routes..................................................................................................................................................219
Conguring BGP Confederations...........................................................................................................................219
Enabling Route Flap Dampening............................................................................................................................ 220
Changing BGP Timers.............................................................................................................................................222
Setting the extended timer.....................................................................................................................................223
Enabling BGP Neighbor Soft-Reconguration.....................................................................................................223
Enabling or disabling BGP neighbors.....................................................................................................................224
Route Map Continue............................................................................................................................................... 225
Enabling MBGP Congurations................................................................................................................................... 226
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor..........................................227
BGP Regular Expression Optimization........................................................................................................................ 227
Debugging BGP..............................................................................................................................................................227
Storing Last and Bad PDUs....................................................................................................................................228
Capturing PDUs....................................................................................................................................................... 229
PDU Counters.......................................................................................................................................................... 230
Sample Congurations.................................................................................................................................................. 230
9 Content Addressable Memory (CAM)........................................................................................................ 239
CAM Allocation...............................................................................................................................................................239
Test CAM Usage.............................................................................................................................................................241
View CAM-ACL Settings............................................................................................................................................... 241
View CAM Usage...........................................................................................................................................................242
Conguring CAM Threshold and Silence Period........................................................................................................242
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