Concept Guide

Four-Byte AS Numbers............................................................................................................................................ 171
BGP router ID.............................................................................................................................................................171
Sessions and Peers................................................................................................................................................... 171
Establish a Session................................................................................................................................................... 172
BGP Attributes for selecting Best Path.................................................................................................................172
Multiprotocol BGP.................................................................................................................................................... 177
BGP global and address family conguration........................................................................................................178
Implement BGP with Dell EMC Networking OS...................................................................................................180
Conguration Information........................................................................................................................................183
Basic BGP conguration tasks......................................................................................................................................183
Prerequisite for conguring a BGP network......................................................................................................... 183
Restrictions............................................................................................................................................................... 184
Enabling BGP............................................................................................................................................................ 184
Enabling four-byte autonomous system numbers................................................................................................186
Changing a BGP router ID....................................................................................................................................... 187
Conguring AS4 Number Representations........................................................................................................... 187
Conguring a BGP peer...........................................................................................................................................189
Example-Conguring BGP routing between peers..............................................................................................190
BGP peer group.........................................................................................................................................................191
Advanced BGP conguration tasks..............................................................................................................................197
Route-refresh and Soft-reconguration................................................................................................................198
Aggregating Routes.................................................................................................................................................200
Filtering BGP............................................................................................................................................................ 202
Conguring BGP Fast Fall-Over............................................................................................................................ 209
Conguring Passive Peering................................................................................................................................... 210
Enabling Graceful Restart........................................................................................................................................ 211
Redistributing Routes...............................................................................................................................................212
Enabling Additional Paths........................................................................................................................................ 213
Conguring IP Community Lists............................................................................................................................. 214
Conguring an IP Extended Community List........................................................................................................215
Congure BGP attributes........................................................................................................................................216
Enabling Multipath...................................................................................................................................................220
Route Reectors.......................................................................................................................................................221
Enabling Route Flap Dampening............................................................................................................................ 222
Changing BGP keepalive and hold timers.............................................................................................................224
Setting the extended timer.................................................................................................................................... 225
Enabling or disabling BGP neighbors.....................................................................................................................226
Route Map Continue............................................................................................................................................... 227
Conguring BGP Confederations...........................................................................................................................227
Conguring a BGP VRF address family.................................................................................................................228
Maintaining Existing AS Numbers During an AS Migration................................................................................ 229
Allowing an AS Number to Appear in its Own AS Path...................................................................................... 230
Enabling MBGP Congurations.............................................................................................................................. 231
MBGP support for IPv6...........................................................................................................................................231
Conguring IPv6 MBGP between peers...............................................................................................................232
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