Administrator Guide

Congure BFD for IS-IS...........................................................................................................................................158
Congure BFD for BGP...........................................................................................................................................160
Congure BFD for VRRP.........................................................................................................................................168
Conguring Protocol Liveness................................................................................................................................ 170
9 Border Gateway Protocol (BGP)................................................................................................................. 171
Border Gateway Protocol version 4 (BGPv4)..............................................................................................................171
Autonomous Systems (AS)......................................................................................................................................171
AS4 Number Representation.................................................................................................................................. 173
Four-Byte AS Numbers............................................................................................................................................175
BGP router ID............................................................................................................................................................175
Sessions and Peers...................................................................................................................................................175
Establish a Session................................................................................................................................................... 176
BGP Attributes for selecting Best Path.................................................................................................................176
Multiprotocol BGP.....................................................................................................................................................181
Implementing BGP global and address family....................................................................................................... 183
Implement BGP with Dell EMC Networking OS...................................................................................................184
Conguration Information........................................................................................................................................187
Conguring a basic BGP network.................................................................................................................................187
Prerequisite for conguring a BGP network..........................................................................................................187
Restrictions............................................................................................................................................................... 188
Enabling BGP............................................................................................................................................................ 188
Enabling four-byte autonomous system numbers................................................................................................190
Changing a BGP router ID........................................................................................................................................191
Conguring AS4 Number Representations........................................................................................................... 192
Conguring a BGP peer...........................................................................................................................................193
Example-Conguring BGP routing between peers.............................................................................................. 194
BGP peer group........................................................................................................................................................195
Advanced BGP conguration tasks.............................................................................................................................204
Route-refresh and Soft-reconguration............................................................................................................... 204
Aggregating Routes................................................................................................................................................. 207
Filtering BGP............................................................................................................................................................ 209
Conguring BGP Fast Fall-Over.............................................................................................................................215
Conguring Passive Peering....................................................................................................................................217
Enabling Graceful Restart........................................................................................................................................218
Redistributing Routes...............................................................................................................................................219
Redistributing iBGP Routes into IGP......................................................................................................................219
Enabling Additional Paths........................................................................................................................................ 221
Conguring IP Community Lists............................................................................................................................ 222
Conguring an IP Extended Community List....................................................................................................... 223
Congure BGP attributes....................................................................................................................................... 224
Enabling Multipath...................................................................................................................................................228
Route Reectors......................................................................................................................................................229
Enabling Route Flap Dampening............................................................................................................................ 230
Changing BGP Timers.............................................................................................................................................232
Setting the extended timer.....................................................................................................................................233
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