White Papers

Regular Expressions as Filters.................................................................................................................................210
Redistributing Routes............................................................................................................................................... 211
Enabling Additional Paths........................................................................................................................................ 212
Conguring IP Community Lists............................................................................................................................. 212
Conguring an IP Extended Community List........................................................................................................ 213
Filtering Routes with Community Lists.................................................................................................................. 214
Manipulating the COMMUNITY Attribute.............................................................................................................215
Changing MED Attributes....................................................................................................................................... 216
Changing the LOCAL_PREFERENCE Attribute.................................................................................................. 216
Conguring the local System or a Dierent System to be the Next Hop for BGP-Learned Routes............. 217
Changing the WEIGHT Attribute............................................................................................................................218
Enabling Multipath....................................................................................................................................................218
Filtering BGP Routes................................................................................................................................................218
Filtering BGP Routes Using Route Maps..............................................................................................................220
Filtering BGP Routes Using AS-PATH Information..............................................................................................220
Conguring BGP Route Reectors........................................................................................................................ 221
Aggregating Routes.................................................................................................................................................222
Conguring BGP Confederations.......................................................................................................................... 222
Enabling Route Flap Dampening............................................................................................................................ 223
Changing BGP Timers.............................................................................................................................................225
Enabling BGP Neighbor Soft-Reconguration.....................................................................................................225
Enabling or disabling BGP neighbors.....................................................................................................................226
Route Map Continue............................................................................................................................................... 228
Enabling MBGP Congurations................................................................................................................................... 228
Congure IPv6 NH Automatically for IPv6 Prex Advertised over IPv4 Neighbor......................................... 229
BGP Regular Expression Optimization........................................................................................................................229
Debugging BGP............................................................................................................................................................. 229
Storing Last and Bad PDUs....................................................................................................................................230
Capturing PDUs........................................................................................................................................................231
PDU Counters.......................................................................................................................................................... 232
Sample Congurations.................................................................................................................................................. 232
10 Content Addressable Memory (CAM).......................................................................................................239
CAM Allocation...............................................................................................................................................................239
Test CAM Usage.............................................................................................................................................................241
View CAM-ACL Settings............................................................................................................................................... 241
View CAM Usage...........................................................................................................................................................242
Conguring CAM Threshold and Silence Period........................................................................................................243
Setting CAM Threshold and Silence Period..........................................................................................................243
CAM Optimization......................................................................................................................................................... 244
Troubleshoot CAM Proling..........................................................................................................................................244
QoS CAM Region Limitation...................................................................................................................................245
Syslog Error When the Table is Full....................................................................................................................... 245
Syslog Warning Upon 90 Percent Utilization of CAM.........................................................................................245
Syslog Warning for Discrepancies Between Congured Extended Prexes....................................................245
Unied Forwarding Table (UFT) Modes......................................................................................................................245
8
Contents