Setup Guide

Congure BFD for IS-IS...........................................................................................................................................163
Congure BFD for BGP...........................................................................................................................................165
Congure BFD for VRRP.........................................................................................................................................173
Conguring Protocol Liveness................................................................................................................................ 175
9 Border Gateway Protocol (BGP)................................................................................................................ 176
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 176
BGP Autonomous Systems..................................................................................................................................... 176
AS4 Number Representation.................................................................................................................................. 178
Four-Byte AS Numbers........................................................................................................................................... 180
BGP router ID............................................................................................................................................................180
Sessions and Peers.................................................................................................................................................. 180
Establish a Session....................................................................................................................................................181
BGP Attributes for selecting Best Path..................................................................................................................181
Multiprotocol BGP....................................................................................................................................................186
BGP global and address family conguration........................................................................................................187
Implement BGP with Dell EMC Networking OS...................................................................................................189
Conguration Information........................................................................................................................................192
Basic BGP conguration tasks......................................................................................................................................192
Prerequisite for conguring a BGP network......................................................................................................... 192
Restrictions............................................................................................................................................................... 193
Enabling BGP............................................................................................................................................................ 193
Enabling four-byte autonomous system numbers................................................................................................195
Changing a BGP router ID.......................................................................................................................................196
Conguring AS4 Number Representations...........................................................................................................196
Conguring a BGP peer...........................................................................................................................................198
Example-Conguring BGP routing between peers.............................................................................................. 199
BGP peer group....................................................................................................................................................... 200
Advanced BGP conguration tasks.............................................................................................................................206
Route-refresh and Soft-reconguration............................................................................................................... 207
Aggregating Routes.................................................................................................................................................209
Filtering BGP..............................................................................................................................................................211
Conguring BGP Fast Fall-Over.............................................................................................................................218
Conguring Passive Peering................................................................................................................................... 219
Enabling Graceful Restart.......................................................................................................................................220
Redistributing Routes...............................................................................................................................................221
Redistributing iBGP Routes into IGP.....................................................................................................................222
Enabling Additional Paths........................................................................................................................................224
Conguring IP Community Lists............................................................................................................................ 225
Conguring an IP Extended Community List....................................................................................................... 226
Congure BGP attributes........................................................................................................................................227
Enabling Multipath....................................................................................................................................................231
Route Reectors......................................................................................................................................................232
Enabling Route Flap Dampening............................................................................................................................ 233
Changing BGP keepalive and hold timers.............................................................................................................236
Setting the extended timer.....................................................................................................................................237
Contents
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