Setup Guide

BFD Sessions............................................................................................................................................................ 153
BFD Three-Way Handshake.................................................................................................................................... 154
Session State Changes............................................................................................................................................156
Important Points to Remember....................................................................................................................................156
Congure BFD.................................................................................................................................................................157
Congure BFD for Physical Ports...........................................................................................................................157
Congure BFD for Static Routes............................................................................................................................159
Congure BFD for IPv6 Static Routes...................................................................................................................162
Congure BFD for OSPF.........................................................................................................................................165
Congure BFD for OSPFv3.....................................................................................................................................170
Congure BFD for IS-IS...........................................................................................................................................173
Congure BFD for BGP........................................................................................................................................... 175
Congure BFD for VRRP.........................................................................................................................................183
Conguring Protocol Liveness................................................................................................................................185
9 Border Gateway Protocol (BGP)................................................................................................................ 186
BGP IP version 4 (BGPv4) Overview..........................................................................................................................186
BGP Autonomous Systems.....................................................................................................................................186
AS4 Number Representation.................................................................................................................................. 188
Four-Byte AS Numbers........................................................................................................................................... 190
BGP router ID............................................................................................................................................................190
Sessions and Peers.................................................................................................................................................. 190
Establish a Session....................................................................................................................................................191
BGP Attributes for selecting Best Path..................................................................................................................191
Multiprotocol BGP....................................................................................................................................................196
BGP global and address family conguration........................................................................................................197
Implement BGP with Dell EMC Networking OS...................................................................................................199
Conguration Information.......................................................................................................................................202
Basic BGP conguration tasks.....................................................................................................................................202
Prerequisite for conguring a BGP network.........................................................................................................202
Restrictions...............................................................................................................................................................203
Enabling BGP........................................................................................................................................................... 203
Enabling four-byte autonomous system numbers............................................................................................... 205
Changing a BGP router ID...................................................................................................................................... 206
Conguring AS4 Number Representations.......................................................................................................... 206
Conguring a BGP peer..........................................................................................................................................208
Example-Conguring BGP routing between peers............................................................................................. 209
BGP peer group........................................................................................................................................................210
Advanced BGP conguration tasks............................................................................................................................. 216
Route-refresh and Soft-reconguration................................................................................................................ 217
Aggregating Routes..................................................................................................................................................219
Filtering BGP.............................................................................................................................................................221
Conguring BGP Fast Fall-Over............................................................................................................................ 228
Conguring Passive Peering...................................................................................................................................229
Enabling Graceful Restart.......................................................................................................................................230
Redistributing Routes...............................................................................................................................................231
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