Concept Guide

BFD Sessions............................................................................................................................................................ 150
BFD Three-Way Handshake.....................................................................................................................................151
Session State Changes............................................................................................................................................153
Important Points to Remember.................................................................................................................................... 153
Congure BFD................................................................................................................................................................ 154
Congure BFD for Physical Ports...........................................................................................................................154
Congure BFD for Static Routes............................................................................................................................157
Congure BFD for IPv6 Static Routes................................................................................................................... 161
Congure BFD for OSPF.........................................................................................................................................163
Congure BFD for OSPFv3.....................................................................................................................................168
Congure BFD for IS-IS............................................................................................................................................171
Congure BFD for BGP........................................................................................................................................... 173
Congure BFD for VRRP..........................................................................................................................................181
Conguring Protocol Liveness................................................................................................................................ 183
9 Border Gateway Protocol (BGP)................................................................................................................ 184
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 184
BGP Autonomous Systems.....................................................................................................................................184
AS4 Number Representation.................................................................................................................................. 186
Four-Byte AS Numbers............................................................................................................................................188
BGP router ID............................................................................................................................................................188
Sessions and Peers.................................................................................................................................................. 188
Establish a Session...................................................................................................................................................189
BGP Attributes for selecting Best Path.................................................................................................................189
Multiprotocol BGP....................................................................................................................................................194
BGP global and address family conguration........................................................................................................195
Implement BGP with Dell EMC Networking OS................................................................................................... 197
Conguration Information.......................................................................................................................................200
Basic BGP conguration tasks.....................................................................................................................................200
Prerequisite for conguring a BGP network........................................................................................................ 200
Restrictions............................................................................................................................................................... 201
Enabling BGP............................................................................................................................................................ 201
Enabling four-byte autonomous system numbers............................................................................................... 203
Changing a BGP router ID...................................................................................................................................... 204
Conguring AS4 Number Representations.......................................................................................................... 204
Conguring a BGP peer..........................................................................................................................................206
Example-Conguring BGP routing between peers..............................................................................................207
BGP peer group....................................................................................................................................................... 208
Advanced BGP conguration tasks..............................................................................................................................214
Route-refresh and Soft-reconguration................................................................................................................215
Aggregating Routes..................................................................................................................................................217
Filtering BGP.............................................................................................................................................................219
Conguring BGP Fast Fall-Over............................................................................................................................ 226
Conguring Passive Peering...................................................................................................................................227
Enabling Graceful Restart.......................................................................................................................................228
Redistributing Routes..............................................................................................................................................229
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