Reference Guide

Implement BGP with Dell Networking OS....................................................................................... 163
Additional Path (Add-Path) Support........................................................................................... 163
Advertise IGP Cost as MED for Redistributed Routes................................................................ 163
Ignore Router-ID for Some Best-Path Calculations..................................................................164
Four-Byte AS Numbers............................................................................................................... 164
AS4 Number Representation...................................................................................................... 165
AS Number Migration..................................................................................................................166
BGP4 Management Information Base (MIB).............................................................................. 168
Important Points to Remember..................................................................................................168
Configuration Information................................................................................................................169
BGP Configuration............................................................................................................................169
Enabling BGP............................................................................................................................... 170
Configuring AS4 Number Representations................................................................................ 174
Configuring Peer Groups............................................................................................................ 176
Configuring BGP Fast Fall-Over..................................................................................................179
Configuring Passive Peering.......................................................................................................180
Maintaining Existing AS Numbers During an AS Migration........................................................ 181
Allowing an AS Number to Appear in its Own AS Path..............................................................182
Enabling Graceful Restart............................................................................................................183
Enabling Neighbor Graceful Restart...........................................................................................184
Filtering on an AS-Path Attribute................................................................................................ 185
Regular Expressions as Filters..................................................................................................... 186
Redistributing Routes..................................................................................................................188
Enabling Additional Paths........................................................................................................... 188
Configuring IP Community Lists.................................................................................................189
Configuring an IP Extended Community List............................................................................. 191
Filtering Routes with Community Lists.......................................................................................192
Manipulating the COMMUNITY Attribute...................................................................................192
Changing MED Attributes........................................................................................................... 194
Changing the LOCAL_PREFERENCE Attribute.......................................................................... 194
Changing the NEXT_HOP Attribute............................................................................................195
Changing the WEIGHT Attribute.................................................................................................196
Enabling Multipath...................................................................................................................... 196
Filtering BGP Routes................................................................................................................... 196
Filtering BGP Routes Using Route Maps.................................................................................... 198
Filtering BGP Routes Using AS-PATH Information.................................................................... 199
Configuring BGP Route Reflectors.............................................................................................199
Aggregating Routes.................................................................................................................... 200
Configuring BGP Confederations...............................................................................................201
Enabling Route Flap Dampening................................................................................................201
Changing BGP Timers................................................................................................................ 204
Enabling BGP Neighbor Soft-Reconfiguration..........................................................................204