Users Guide

BFD Sessions............................................................................................................................................................ 150
BFD Three-Way Handshake.....................................................................................................................................151
Session State Changes............................................................................................................................................153
Important Points to Remember.................................................................................................................................... 153
Congure BFD................................................................................................................................................................ 153
Congure BFD for Physical Ports...........................................................................................................................154
Congure BFD for Static Routes............................................................................................................................155
Congure BFD for IPv6 Static Routes...................................................................................................................159
Congure BFD for OSPF..........................................................................................................................................161
Congure BFD for OSPFv3.....................................................................................................................................166
Congure BFD for IS-IS...........................................................................................................................................169
Congure BFD for BGP............................................................................................................................................171
Congure BFD for VRRP.........................................................................................................................................179
Conguring Protocol Liveness.................................................................................................................................181
9 Border Gateway Protocol (BGP)................................................................................................................ 182
Border Gateway Protocol version 4 (BGPv4).............................................................................................................182
Autonomous Systems (AS)........................................................................................................................................... 182
AS4 Number Representation.................................................................................................................................. 184
Four-Byte AS Numbers............................................................................................................................................186
Multiprotocol BGP..........................................................................................................................................................186
MBGP for IPv4 MulticastBGP Address Family modelIPv4 and IPv6 address family........................................187
Sessions and Peers.........................................................................................................................................................187
Establish a Session................................................................................................................................................... 187
Implementing BGP global and address family.............................................................................................................188
BGP global conguration default values................................................................................................................189
BGP Attributes for selecting Best Path.......................................................................................................................189
Best Path Selection Criteria....................................................................................................................................190
Weight........................................................................................................................................................................ 191
Local Preference.......................................................................................................................................................192
Multi-Exit Discriminators (MEDs)...........................................................................................................................192
Origin..........................................................................................................................................................................193
AS Path......................................................................................................................................................................194
Next Hop................................................................................................................................................................... 194
Implement BGP with Dell EMC Networking OS.........................................................................................................195
Additional Path (Add-Path) Support......................................................................................................................195
Advertise IGP Cost as MED for Redistributed Routes........................................................................................ 195
Ignore Router-ID in Best-Path Calculation............................................................................................................ 196
AS Number Migration.............................................................................................................................................. 196
BGP4 Management Information Base (MIB)........................................................................................................197
Important Points to Remember.............................................................................................................................. 197
Conguration Information..............................................................................................................................................198
Conguring a basic BGP network................................................................................................................................ 198
Enabling BGP............................................................................................................................................................ 198
Conguring a BGP peer...........................................................................................................................................201
Conguring AS4 Number Representations.......................................................................................................... 202
Contents
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