Concept Guide

Congure BFD for IPv6 Static Routes....................................................................................................................151
Congure BFD for OSPF.........................................................................................................................................154
Congure BFD for OSPFv3.....................................................................................................................................157
Congure BFD for IS-IS...........................................................................................................................................160
Congure BFD for BGP........................................................................................................................................... 162
Congure BFD for VRRP.........................................................................................................................................169
Conguring Protocol Liveness................................................................................................................................ 172
9 Border Gateway Protocol (BGP).................................................................................................................173
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 173
BGP Autonomous Systems..................................................................................................................................... 173
AS4 Number Representation.................................................................................................................................. 175
Four-Byte AS Numbers............................................................................................................................................177
BGP router ID............................................................................................................................................................177
Sessions and Peers...................................................................................................................................................177
Establish a Session................................................................................................................................................... 178
BGP Attributes for selecting Best Path.................................................................................................................178
Multiprotocol BGP....................................................................................................................................................183
BGP global and address family conguration........................................................................................................184
Implement BGP with Dell EMC Networking OS...................................................................................................186
Conguration Information........................................................................................................................................189
Basic BGP conguration tasks......................................................................................................................................189
Prerequisite for conguring a BGP network......................................................................................................... 189
Restrictions............................................................................................................................................................... 190
Enabling BGP............................................................................................................................................................ 190
Enabling four-byte autonomous system numbers................................................................................................192
Changing a BGP router ID.......................................................................................................................................193
Conguring AS4 Number Representations........................................................................................................... 193
Conguring a BGP peer...........................................................................................................................................195
Example-Conguring BGP routing between peers.............................................................................................. 196
BGP peer group........................................................................................................................................................ 197
Advanced BGP conguration tasks.............................................................................................................................203
Route-refresh and Soft-reconguration............................................................................................................... 204
Aggregating Routes.................................................................................................................................................206
Filtering BGP............................................................................................................................................................ 208
Conguring BGP Fast Fall-Over.............................................................................................................................215
Conguring Passive Peering................................................................................................................................... 216
Enabling Graceful Restart........................................................................................................................................217
Redistributing Routes...............................................................................................................................................218
Enabling Additional Paths........................................................................................................................................ 219
Conguring IP Community Lists............................................................................................................................ 220
Conguring an IP Extended Community List........................................................................................................ 221
Congure BGP attributes....................................................................................................................................... 222
Enabling Multipath...................................................................................................................................................226
Route Reectors...................................................................................................................................................... 227
Enabling Route Flap Dampening............................................................................................................................ 228
Contents
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