Users Guide

Table Of Contents
Congure BFD for IPv6 Static Routes...................................................................................................................152
Congure BFD for OSPF.........................................................................................................................................154
Congure BFD for OSPFv3.....................................................................................................................................157
Congure BFD for IS-IS...........................................................................................................................................160
Congure BFD for BGP........................................................................................................................................... 162
Congure BFD for VRRP.........................................................................................................................................170
Conguring Protocol Liveness................................................................................................................................ 172
9 Border Gateway Protocol (BGP).................................................................................................................173
Border Gateway Protocol version 4 (BGPv4).............................................................................................................173
Autonomous Systems (AS)........................................................................................................................................... 173
AS4 Number Representation.................................................................................................................................. 175
Four-Byte AS Numbers............................................................................................................................................177
Multiprotocol BGP.......................................................................................................................................................... 177
MBGP for IPv4 MulticastBGP Address Family modelIPv4 and IPv6 address family........................................178
Sessions and Peers.........................................................................................................................................................178
Establish a Session................................................................................................................................................... 178
Implementing BGP global and address family............................................................................................................. 179
BGP global conguration default values................................................................................................................180
BGP Attributes for selecting Best Path.......................................................................................................................180
Best Path Selection Criteria.....................................................................................................................................181
Weight........................................................................................................................................................................182
Local Preference.......................................................................................................................................................183
Multi-Exit Discriminators (MEDs)...........................................................................................................................183
Origin..........................................................................................................................................................................184
AS Path......................................................................................................................................................................185
Next Hop................................................................................................................................................................... 185
Implement BGP with Dell EMC Networking OS.........................................................................................................186
Additional Path (Add-Path) Support......................................................................................................................186
Advertise IGP Cost as MED for Redistributed Routes........................................................................................ 186
Ignore Router-ID in Best-Path Calculation.............................................................................................................187
AS Number Migration...............................................................................................................................................187
BGP4 Management Information Base (MIB)........................................................................................................188
Important Points to Remember.............................................................................................................................. 188
Conguration Information..............................................................................................................................................189
Conguring a basic BGP network................................................................................................................................ 189
Enabling BGP............................................................................................................................................................ 189
Conguring a BGP peer...........................................................................................................................................192
Conguring AS4 Number Representations........................................................................................................... 193
Conguring a BGP VRF address family................................................................................................................. 194
Route-refresh and Soft-reconguration................................................................................................................196
Aggregating Routes..................................................................................................................................................199
Filtering BGP Routes................................................................................................................................................199
Filtering BGP Routes Using Route Maps...............................................................................................................201
Filtering BGP Routes Using AS-PATH Information.............................................................................................. 201
Conguring Peer Groups........................................................................................................................................ 202
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