White Papers

Table Of Contents
Regular Expressions as Filters................................................................................................................................203
Redistributing Routes..............................................................................................................................................204
Enabling Additional Paths....................................................................................................................................... 205
Conguring IP Community Lists............................................................................................................................ 205
Conguring an IP Extended Community List....................................................................................................... 206
Filtering Routes with Community Lists................................................................................................................. 207
Manipulating the COMMUNITY Attribute............................................................................................................208
Changing MED Attributes.......................................................................................................................................209
Changing the LOCAL_PREFERENCE Attribute..................................................................................................209
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes............. 210
Changing the WEIGHT Attribute.............................................................................................................................211
Enabling Multipath.................................................................................................................................................... 211
Filtering BGP Routes.................................................................................................................................................211
Filtering BGP Routes Using Route Maps...............................................................................................................213
Filtering BGP Routes Using AS-PATH Information.............................................................................................. 213
Conguring BGP Route Reectors........................................................................................................................ 214
Aggregating Routes..................................................................................................................................................215
Conguring BGP Confederations...........................................................................................................................215
Enabling Route Flap Dampening.............................................................................................................................216
Changing BGP Timers..............................................................................................................................................218
Enabling BGP Neighbor Soft-Reconguration..................................................................................................... 218
Enabling or disabling BGP neighbors..................................................................................................................... 219
Route Map Continue................................................................................................................................................221
Enabling MBGP Congurations.................................................................................................................................... 221
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor......................................... 222
BGP Regular Expression Optimization........................................................................................................................222
Debugging BGP..............................................................................................................................................................222
Storing Last and Bad PDUs....................................................................................................................................223
Capturing PDUs....................................................................................................................................................... 224
PDU Counters.......................................................................................................................................................... 225
Sample Congurations.................................................................................................................................................. 225
10 Content Addressable Memory (CAM).......................................................................................................232
CAM Allocation...............................................................................................................................................................232
Test CAM Usage............................................................................................................................................................ 234
View CAM-ACL Settings.............................................................................................................................................. 234
View CAM Usage...........................................................................................................................................................236
Conguring CAM Threshold and Silence Period........................................................................................................236
Setting CAM Threshold and Silence Period..........................................................................................................237
CAM Optimization......................................................................................................................................................... 238
Troubleshoot CAM Proling..........................................................................................................................................238
QoS CAM Region Limitation...................................................................................................................................238
11 Control Plane Policing (CoPP).................................................................................................................. 239
Congure Control Plane Policing................................................................................................................................. 240
Conguring CoPP for Protocols............................................................................................................................. 241
8
Contents