Install Guide

Table Of Contents
BFD Sessions.............................................................................................................................................................. 108
BFD Three-Way Handshake.................................................................................................................................... 109
Session State Changes............................................................................................................................................. 110
Important Points to Remember.................................................................................................................................... 110
Configure BFD...................................................................................................................................................................110
Configure BFD for Physical Ports........................................................................................................................... 111
Configure BFD for Static Routes............................................................................................................................112
Configure BFD for IPv6 Static Routes.................................................................................................................. 115
Configure BFD for OSPF.......................................................................................................................................... 117
Configure BFD for OSPFv3......................................................................................................................................121
Configure BFD for IS-IS........................................................................................................................................... 124
Configure BFD for BGP............................................................................................................................................126
Configure BFD for VRRP......................................................................................................................................... 132
Configuring Protocol Liveness................................................................................................................................134
Chapter 8: Border Gateway Protocol (BGP)............................................................................... 135
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 135
BGP Autonomous Systems......................................................................................................................................135
AS4 Number Representation...................................................................................................................................137
Four-Byte AS Numbers............................................................................................................................................ 139
BGP router ID............................................................................................................................................................. 139
Sessions and Peers....................................................................................................................................................139
Establish a Session.................................................................................................................................................... 139
BGP Attributes for selecting Best Path............................................................................................................... 140
Multiprotocol BGP..................................................................................................................................................... 145
BGP global and address family configuration......................................................................................................146
Implement BGP with Dell EMC Networking OS................................................................................................. 147
Configuration Information........................................................................................................................................150
Basic BGP configuration tasks..................................................................................................................................... 150
Prerequisite for configuring a BGP network.......................................................................................................150
Restrictions.................................................................................................................................................................. 151
Enabling BGP............................................................................................................................................................... 151
Enabling four-byte autonomous system numbers............................................................................................. 153
Changing a BGP router ID....................................................................................................................................... 153
Configuring AS4 Number Representations..........................................................................................................154
Configuring a BGP peer........................................................................................................................................... 155
Example-Configuring BGP routing between peers............................................................................................156
BGP peer group..........................................................................................................................................................157
Advanced BGP configuration tasks.............................................................................................................................162
Route-refresh and Soft-reconfiguration.............................................................................................................. 162
Aggregating Routes...................................................................................................................................................164
Filtering BGP...............................................................................................................................................................166
Configuring BGP Fast Fall-Over..............................................................................................................................171
Configuring Passive Peering....................................................................................................................................173
Enabling Graceful Restart........................................................................................................................................ 174
Redistributing Routes................................................................................................................................................174
Enabling Additional Paths.........................................................................................................................................175
Configuring IP Community Lists............................................................................................................................. 176
Configuring an IP Extended Community List.......................................................................................................177
Configure BGP attributes........................................................................................................................................ 178
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Contents