Concept Guide

Congure BFD for IS-IS...........................................................................................................................................162
Congure BFD for BGP........................................................................................................................................... 164
Congure BFD for VRRP.........................................................................................................................................172
Conguring Protocol Liveness.................................................................................................................................174
9 Border Gateway Protocol (BGP)................................................................................................................ 175
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 175
BGP Autonomous Systems.....................................................................................................................................175
AS4 Number Representation...................................................................................................................................177
Four-Byte AS Numbers............................................................................................................................................179
BGP router ID............................................................................................................................................................179
Sessions and Peers...................................................................................................................................................179
Establish a Session...................................................................................................................................................180
BGP Attributes for selecting Best Path.................................................................................................................180
Multiprotocol BGP....................................................................................................................................................185
BGP global and address family conguration........................................................................................................186
Implement BGP with Dell EMC Networking OS...................................................................................................188
Conguration Information........................................................................................................................................ 191
Basic BGP conguration tasks...................................................................................................................................... 191
Prerequisite for conguring a BGP network..........................................................................................................191
Restrictions............................................................................................................................................................... 192
Enabling BGP............................................................................................................................................................ 192
Enabling four-byte autonomous system numbers................................................................................................194
Changing a BGP router ID.......................................................................................................................................195
Conguring AS4 Number Representations...........................................................................................................195
Conguring a BGP peer...........................................................................................................................................197
Example-Conguring BGP routing between peers.............................................................................................. 198
BGP peer group........................................................................................................................................................199
Advanced BGP conguration tasks.............................................................................................................................205
Route-refresh and Soft-reconguration............................................................................................................... 206
Aggregating Routes.................................................................................................................................................208
Filtering BGP.............................................................................................................................................................210
Conguring BGP Fast Fall-Over............................................................................................................................. 217
Conguring Passive Peering................................................................................................................................... 218
Enabling Graceful Restart........................................................................................................................................219
Redistributing Routes..............................................................................................................................................220
Enabling Additional Paths........................................................................................................................................ 221
Conguring IP Community Lists............................................................................................................................ 222
Conguring an IP Extended Community List....................................................................................................... 223
Congure BGP attributes....................................................................................................................................... 224
Enabling Multipath...................................................................................................................................................228
Route Reectors......................................................................................................................................................229
Enabling Route Flap Dampening............................................................................................................................ 230
Changing BGP keepalive and hold timers.............................................................................................................232
Setting the extended timer.....................................................................................................................................233
Enabling or disabling BGP neighbors.....................................................................................................................234
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