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............................................................................................................................160
Congure BFD for IPv6 Static Routes...................................................................................................................164
Congure BFD for OSPF.........................................................................................................................................166
Congure BFD for OSPFv3......................................................................................................................................171
Congure BFD for IS-IS........................................................................................................................................... 174
Congure BFD for BGP........................................................................................................................................... 176
Congure BFD for VRRP.........................................................................................................................................184
Conguring Protocol Liveness................................................................................................................................186
9 Border Gateway Protocol (BGP).................................................................................................................187
BGP IP version 4 (BGPv4) Overview.......................................................................................................................... 187
BGP Autonomous Systems..................................................................................................................................... 187
AS4 Number Representation.................................................................................................................................. 189
Four-Byte AS Numbers............................................................................................................................................ 191
BGP router ID............................................................................................................................................................ 191
Sessions and Peers................................................................................................................................................... 191
Establish a Session................................................................................................................................................... 192
BGP Attributes for selecting Best Path.................................................................................................................192
Multiprotocol BGP.................................................................................................................................................... 197
BGP global and address family conguration........................................................................................................198
Implement BGP with Dell EMC Networking OS..................................................................................................200
Conguration Information.......................................................................................................................................203
Basic BGP conguration tasks.....................................................................................................................................203
Prerequisite for conguring a BGP network.........................................................................................................203
Restrictions...............................................................................................................................................................204
Enabling BGP........................................................................................................................................................... 204
Enabling four-byte autonomous system numbers............................................................................................... 206
Changing a BGP router ID...................................................................................................................................... 207
Conguring AS4 Number Representations...........................................................................................................207
Conguring a BGP peer..........................................................................................................................................209
Example-Conguring BGP routing between peers.............................................................................................. 210
BGP peer group.........................................................................................................................................................211
Advanced BGP conguration tasks..............................................................................................................................217
Route-refresh and Soft-reconguration................................................................................................................218
Aggregating Routes.................................................................................................................................................220
Filtering BGP............................................................................................................................................................ 222
Conguring BGP Fast Fall-Over............................................................................................................................ 229
Conguring Passive Peering...................................................................................................................................230
Enabling Graceful Restart........................................................................................................................................231
Redistributing Routes..............................................................................................................................................232
Contents
7