Service Manual

AS4 Number Representation.................................................................................................................................. 159
AS Number Migration............................................................................................................................................... 161
BGP4 Management Information Base (MIB)........................................................................................................162
Important Points to Remember.............................................................................................................................. 162
Conguration Information..............................................................................................................................................163
BGP Conguration......................................................................................................................................................... 163
Enabling BGP............................................................................................................................................................ 164
Conguring AS4 Number Representations........................................................................................................... 167
Conguring Peer Groups.........................................................................................................................................168
Conguring BGP Fast Fall-Over..............................................................................................................................171
Conguring Passive Peering....................................................................................................................................172
Maintaining Existing AS Numbers During an AS Migration................................................................................. 173
Allowing an AS Number to Appear in its Own AS Path........................................................................................174
Enabling Graceful Restart........................................................................................................................................175
Enabling Neighbor Graceful Restart.......................................................................................................................176
Filtering on an AS-Path Attribute........................................................................................................................... 176
Regular Expressions as Filters................................................................................................................................. 177
Redistributing Routes...............................................................................................................................................179
Enabling Additional Paths........................................................................................................................................ 179
Conguring IP Community Lists............................................................................................................................. 180
Conguring an IP Extended Community List.........................................................................................................181
Filtering Routes with Community Lists.................................................................................................................. 182
Manipulating the COMMUNITY Attribute.............................................................................................................182
Changing MED Attributes....................................................................................................................................... 184
Changing the LOCAL_PREFERENCE Attribute.................................................................................................. 184
Changing the NEXT_HOP Attribute......................................................................................................................185
Changing the WEIGHT Attribute............................................................................................................................185
Enabling Multipath....................................................................................................................................................186
Filtering BGP Routes................................................................................................................................................186
Filtering BGP Routes Using Route Maps...............................................................................................................187
Filtering BGP Routes Using AS-PATH Information.............................................................................................. 188
Conguring BGP Route Reectors........................................................................................................................ 188
Aggregating Routes..................................................................................................................................................189
Conguring BGP Confederations........................................................................................................................... 189
Enabling Route Flap Dampening.............................................................................................................................190
Changing BGP Timers..............................................................................................................................................192
Enabling BGP Neighbor Soft-Reconguration..................................................................................................... 193
Route Map Continue................................................................................................................................................194
Enabling MBGP Congurations.................................................................................................................................... 194
BGP Regular Expression Optimization.........................................................................................................................195
Debugging BGP.............................................................................................................................................................. 195
Storing Last and Bad PDUs.................................................................................................................................... 196
Capturing PDUs........................................................................................................................................................ 197
PDU Counters...........................................................................................................................................................198
Sample Congurations...................................................................................................................................................198
9 Content Addressable Memory (CAM)........................................................................................................204
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