Service Manual

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Conguring Passive Peering...................................................................................................................................... 161

Maintaining Existing AS Numbers During an AS Migration.........................................................................................161

Allowing an AS Number to Appear in its Own AS Path..............................................................................................162

Enabling Graceful Restart......................................................................................................................................... 163

Enabling Neighbor Graceful Restart..........................................................................................................................164

Filtering on an AS-Path Attribute.............................................................................................................................. 164

Regular Expressions as Filters...................................................................................................................................166

Redistributing Routes................................................................................................................................................167

Enabling Additional Paths..........................................................................................................................................168

Conguring IP Community Lists................................................................................................................................168

Conguring an IP Extended Community List.............................................................................................................169

Filtering Routes with Community Lists......................................................................................................................170

Manipulating the COMMUNITY Attribute................................................................................................................. 170

Changing MED Attributes......................................................................................................................................... 172

Changing the LOCAL_PREFERENCE Attribute........................................................................................................ 172

Changing the NEXT_HOP Attribute..........................................................................................................................173

Changing the WEIGHT Attribute...............................................................................................................................173

Enabling Multipath.....................................................................................................................................................174

Filtering BGP Routes.................................................................................................................................................174

Filtering BGP Routes Using Route Maps...................................................................................................................175

Filtering BGP Routes Using AS-PATH Information.................................................................................................... 176

Conguring BGP Route Reectors............................................................................................................................176

Aggregating Routes...................................................................................................................................................177

Conguring BGP Confederations.............................................................................................................................. 177

Enabling Route Flap Dampening................................................................................................................................178

Changing BGP Timers...............................................................................................................................................180

Enabling BGP Neighbor Soft-Reconguration........................................................................................................... 181

Route Map Continue.................................................................................................................................................182

Enabling MBGP Congurations.......................................................................................................................................182

BGP Regular Expression Optimization.............................................................................................................................183

Debugging BGP.............................................................................................................................................................. 183

Storing Last and Bad PDUs.......................................................................................................................................184

Capturing PDUs........................................................................................................................................................185

PDU Counters...........................................................................................................................................................186

Sample Congurations....................................................................................................................................................186

9 Content Addressable Memory (CAM).......................................................................... 193

CAM Allocation............................................................................................................................................................... 193

Test CAM Usage.............................................................................................................................................................195

View CAM Proles..........................................................................................................................................................195

View CAM-ACL Settings................................................................................................................................................ 196

View CAM Usage............................................................................................................................................................ 197

CAM Optimization.......................................................................................................................................................... 198

Troubleshoot CAM Proling............................................................................................................................................ 198

CAM Prole Mismatches.......................................................................................................................................... 198

QoS CAM Region Limitation..................................................................................................................................... 198