Concept Guide

Important Points to Remember.................................................................................................................................... 153
Congure BFD................................................................................................................................................................ 154
Congure BFD for Physical Ports...........................................................................................................................154
Congure BFD for Static Routes............................................................................................................................156
Congure BFD for IPv6 Static Routes...................................................................................................................159
Congure BFD for OSPF.........................................................................................................................................162
Congure BFD for OSPFv3.....................................................................................................................................167
Congure BFD for IS-IS...........................................................................................................................................170
Congure BFD for BGP........................................................................................................................................... 172
Congure BFD for VRRP.........................................................................................................................................180
Conguring Protocol Liveness................................................................................................................................ 182
9 Border Gateway Protocol (BGP)................................................................................................................ 183
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 183
BGP Autonomous Systems.....................................................................................................................................183
AS4 Number Representation.................................................................................................................................. 185
Four-Byte AS Numbers............................................................................................................................................187
BGP router ID............................................................................................................................................................187
Sessions and Peers...................................................................................................................................................187
Establish a Session................................................................................................................................................... 188
BGP Attributes for selecting Best Path.................................................................................................................188
Multiprotocol BGP....................................................................................................................................................193
BGP global and address family conguration........................................................................................................194
Implement BGP with Dell EMC Networking OS...................................................................................................196
Conguration Information........................................................................................................................................199
Basic BGP conguration tasks..................................................................................................................................... 199
Prerequisite for conguring a BGP network......................................................................................................... 199
Restrictions.............................................................................................................................................................. 200
Enabling BGP........................................................................................................................................................... 200
Enabling four-byte autonomous system numbers............................................................................................... 202
Changing a BGP router ID...................................................................................................................................... 203
Conguring AS4 Number Representations.......................................................................................................... 203
Conguring a BGP peer..........................................................................................................................................205
Example-Conguring BGP routing between peers............................................................................................. 206
BGP peer group....................................................................................................................................................... 207
Advanced BGP conguration tasks..............................................................................................................................213
Route-refresh and Soft-reconguration................................................................................................................214
Aggregating Routes..................................................................................................................................................216
Filtering BGP.............................................................................................................................................................218
Conguring BGP Fast Fall-Over............................................................................................................................ 225
Conguring Passive Peering...................................................................................................................................226
Enabling Graceful Restart....................................................................................................................................... 227
Redistributing Routes..............................................................................................................................................228
Redistributing iBGP Routes into IGP.....................................................................................................................229
Enabling Additional Paths........................................................................................................................................ 231
Conguring IP Community Lists............................................................................................................................ 232
Contents
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