Administrator Guide

Table Of Contents
Implement BGP with Dell EMC Networking OS.......................................................................................................176
Configuration Information........................................................................................................................................... 179
Basic BGP configuration tasks......................................................................................................................................... 179
Prerequisite for configuring a BGP network.............................................................................................................179
Restrictions................................................................................................................................................................... 179
Enabling BGP................................................................................................................................................................ 179
Enabling four-byte autonomous system numbers....................................................................................................181
Changing a BGP router ID...........................................................................................................................................182
Configuring AS4 Number Representations...............................................................................................................182
Configuring a BGP peer...............................................................................................................................................183
Example-Configuring BGP routing between peers..................................................................................................184
BGP peer group............................................................................................................................................................185
Advanced BGP configuration tasks.................................................................................................................................192
Route-refresh and Soft-reconfiguration...................................................................................................................192
Aggregating Routes..................................................................................................................................................... 194
Filtering BGP.................................................................................................................................................................196
Configuring BGP Fast Fall-Over.................................................................................................................................201
Configuring Passive Peering...................................................................................................................................... 202
Enabling Graceful Restart.......................................................................................................................................... 203
Redistributing Routes................................................................................................................................................. 204
Enabling Additional Paths........................................................................................................................................... 204
Configuring IP Community Lists................................................................................................................................205
Configuring an IP Extended Community List...........................................................................................................206
Configure BGP attributes...........................................................................................................................................207
Enabling Multipath....................................................................................................................................................... 210
Route Reflectors...........................................................................................................................................................211
Enabling Route Flap Dampening.................................................................................................................................212
Changing BGP keepalive and hold timers................................................................................................................. 214
Setting the extended timer.........................................................................................................................................214
Enabling or disabling BGP neighbors......................................................................................................................... 215
Route Map Continue....................................................................................................................................................216
Configuring BGP Confederations...............................................................................................................................216
Configuring a BGP VRF address family.....................................................................................................................217
Maintaining Existing AS Numbers During an AS Migration.....................................................................................218
Allowing an AS Number to Appear in its Own AS Path...........................................................................................219
Enabling MBGP Configurations.................................................................................................................................220
MBGP support for IPv6..............................................................................................................................................220
Configuring IPv6 MBGP between peers..................................................................................................................220
Example-Configuring IPv4 and IPv6 neighbors........................................................................................................221
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor............................................ 223
BGP Regular Expression Optimization......................................................................................................................224
Debugging BGP........................................................................................................................................................... 225
10 Content Addressable Memory (CAM)........................................................................................227
CAM Allocation.................................................................................................................................................................. 227
Test CAM Usage............................................................................................................................................................... 228
View CAM-ACL Settings..................................................................................................................................................229
View CAM Usage.............................................................................................................................................................. 230
Configuring CAM Threshold and Silence Period........................................................................................................... 230
CAM Optimization.............................................................................................................................................................232
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