Concept Guide

Congure BFD for IPv6 Static Routes...................................................................................................................155
Congure BFD for OSPF.........................................................................................................................................158
Congure BFD for OSPFv3..................................................................................................................................... 161
Congure BFD for IS-IS...........................................................................................................................................164
Congure BFD for BGP...........................................................................................................................................166
Congure BFD for VRRP.........................................................................................................................................173
Conguring Protocol Liveness................................................................................................................................ 176
9 Border Gateway Protocol (BGP).................................................................................................................177
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 177
BGP Autonomous Systems..................................................................................................................................... 177
AS4 Number Representation.................................................................................................................................. 179
Four-Byte AS Numbers............................................................................................................................................ 181
BGP router ID............................................................................................................................................................ 181
Sessions and Peers................................................................................................................................................... 181
Establish a Session................................................................................................................................................... 182
BGP Attributes for selecting Best Path.................................................................................................................182
Multiprotocol BGP.................................................................................................................................................... 187
BGP global and address family conguration........................................................................................................188
Implement BGP with Dell EMC Networking OS...................................................................................................190
Conguration Information........................................................................................................................................193
Basic BGP conguration tasks......................................................................................................................................193
Prerequisite for conguring a BGP network......................................................................................................... 193
Restrictions............................................................................................................................................................... 194
Enabling BGP............................................................................................................................................................ 194
Enabling four-byte autonomous system numbers................................................................................................196
Changing a BGP router ID....................................................................................................................................... 197
Conguring AS4 Number Representations........................................................................................................... 197
Conguring a BGP peer...........................................................................................................................................199
Example-Conguring BGP routing between peers............................................................................................. 200
BGP peer group........................................................................................................................................................201
Advanced BGP conguration tasks.............................................................................................................................207
Route-refresh and Soft-reconguration............................................................................................................... 208
Aggregating Routes..................................................................................................................................................210
Filtering BGP.............................................................................................................................................................212
Conguring BGP Fast Fall-Over.............................................................................................................................219
Conguring Passive Peering...................................................................................................................................220
Enabling Graceful Restart........................................................................................................................................221
Redistributing Routes..............................................................................................................................................222
Enabling Additional Paths........................................................................................................................................223
Conguring IP Community Lists............................................................................................................................ 224
Conguring an IP Extended Community List....................................................................................................... 225
Congure BGP attributes....................................................................................................................................... 226
Enabling Multipath...................................................................................................................................................230
Route Reectors.......................................................................................................................................................231
Enabling Route Flap Dampening............................................................................................................................ 232
Contents
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