Reference Guide

BGP4 Management Information Base (MIB)................................................................................................. 155
Important Points to Remember...................................................................................................................... 155
Configuration Information.....................................................................................................................................156
BGP Configuration................................................................................................................................................ 156
Enabling BGP..................................................................................................................................................157
Configuring AS4 Number Representations.................................................................................................... 160
Configuring Peer Groups................................................................................................................................162
Configuring BGP Fast Fail-Over......................................................................................................................164
Configuring Passive Peering..........................................................................................................................166
Maintaining Existing AS Numbers During an AS Migration...........................................................................167
Allowing an AS Number to Appear in its Own AS Path................................................................................. 167
Enabling Graceful Restart.............................................................................................................................. 168
Enabling Neighbor Graceful Restart.............................................................................................................. 169
Filtering on an AS-Path Attribute................................................................................................................... 170
Regular Expressions as Filters....................................................................................................................... 171
Redistributing Routes..................................................................................................................................... 172
Enabling Additional Paths.............................................................................................................................. 173
Configuring IP Community Lists......................................................................................................................173
Configuring an IP Extended Community List.................................................................................................. 175
Filtering Routes with Community Lists........................................................................................................... 175
Manipulating the COMMUNITY Attribute...................................................................................................... 176
Changing MED Attributes...............................................................................................................................178
Changing the LOCAL_PREFERENCE Attribute................................................................................................178
Changing the NEXT_HOP Attribute................................................................................................................ 179
Changing the WEIGHT Attribute.....................................................................................................................179
Enabling Multipath......................................................................................................................................... 179
Filtering BGP Routes...................................................................................................................................... 180
Filtering BGP Routes Using Route Maps........................................................................................................181
Filtering BGP Routes Using AS-PATH Information........................................................................................ 182
Configuring BGP Route Reflectors.................................................................................................................182
Aggregating Routes........................................................................................................................................183
Configuring BGP Confederations................................................................................................................... 183
Enabling Route Flap Dampening.................................................................................................................... 184
Changing BGP Timers.................................................................................................................................... 186
Enabling BGP Neighbor Soft-Reconfiguration...............................................................................................187
Route Map Continue.......................................................................................................................................188
Enabling MBGP Configurations............................................................................................................................ 189
BGP Regular Expression Optimization..................................................................................................................189
Debugging BGP.....................................................................................................................................................189
Storing Last and Bad PDUs............................................................................................................................ 190
Capturing PDUs.............................................................................................................................................. 191
PDU Counters.................................................................................................................................................192