Deployment Guide

Table Of Contents
BFD Sessions.............................................................................................................................................................. 122
BFD Three-Way Handshake.................................................................................................................................... 123
Session State Changes.............................................................................................................................................124
Important Points to Remember....................................................................................................................................124
Configure BFD.................................................................................................................................................................. 124
Configure BFD for Physical Ports..........................................................................................................................125
Configure BFD for Static Routes........................................................................................................................... 126
Configure BFD for IPv6 Static Routes................................................................................................................. 130
Configure BFD for OSPF..........................................................................................................................................132
Configure BFD for OSPFv3..................................................................................................................................... 138
Configure BFD for IS-IS........................................................................................................................................... 140
Configure BFD for BGP............................................................................................................................................ 142
Configure BFD for VRRP......................................................................................................................................... 149
Configuring Protocol Liveness................................................................................................................................ 151
Chapter 8: Border Gateway Protocol (BGP)............................................................................... 152
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 152
BGP Autonomous Systems......................................................................................................................................152
AS4 Number Representation.................................................................................................................................. 154
Four-Byte AS Numbers............................................................................................................................................ 156
BGP router ID............................................................................................................................................................. 156
Sessions and Peers....................................................................................................................................................156
Establish a Session.................................................................................................................................................... 156
BGP Attributes for selecting Best Path............................................................................................................... 157
Multiprotocol BGP..................................................................................................................................................... 162
BGP global and address family configuration......................................................................................................163
Implement BGP with Dell EMC Networking OS................................................................................................. 164
Configuration Information........................................................................................................................................167
Basic BGP configuration tasks..................................................................................................................................... 168
Prerequisite for configuring a BGP network....................................................................................................... 168
Restrictions................................................................................................................................................................. 168
Enabling BGP.............................................................................................................................................................. 168
Enabling four-byte autonomous system numbers..............................................................................................170
Changing a BGP router ID........................................................................................................................................ 171
Configuring AS4 Number Representations...........................................................................................................171
Configuring a BGP peer............................................................................................................................................172
Example-Configuring BGP routing between peers............................................................................................ 173
BGP peer group..........................................................................................................................................................174
Advanced BGP configuration tasks............................................................................................................................. 181
Route-refresh and Soft-reconfiguration...............................................................................................................181
Aggregating Routes...................................................................................................................................................183
Filtering BGP...............................................................................................................................................................185
Configuring BGP Fast Fall-Over.............................................................................................................................190
Configuring Passive Peering................................................................................................................................... 192
Enabling Graceful Restart........................................................................................................................................192
Redistributing Routes............................................................................................................................................... 193
Enabling Additional Paths........................................................................................................................................ 194
Configuring IP Community Lists.............................................................................................................................195
Configuring an IP Extended Community List...................................................................................................... 196
Configure BGP attributes........................................................................................................................................ 197
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Contents