Install Guide

Table Of Contents
Applying Egress Layer 3 ACLs (Control-Plane)..................................................................................................123
Configuring UDF ACL..................................................................................................................................................... 123
IP Prefix Lists....................................................................................................................................................................127
Configuration Task List for Prefix Lists................................................................................................................127
ACL Resequencing.......................................................................................................................................................... 130
Resequencing an ACL or Prefix List.......................................................................................................................131
Route Maps.......................................................................................................................................................................132
Chapter 8: Bidirectional Forwarding Detection (BFD)................................................................ 133
How BFD Works...............................................................................................................................................................133
BFD Packet Format...................................................................................................................................................134
BFD Sessions.............................................................................................................................................................. 135
BFD Three-Way Handshake.................................................................................................................................... 136
Session State Changes............................................................................................................................................. 137
Important Points to Remember.................................................................................................................................... 137
Configure BFD.................................................................................................................................................................. 137
Configure BFD for Physical Ports..........................................................................................................................138
Configure BFD for Static Routes........................................................................................................................... 139
Configure BFD for OSPF..........................................................................................................................................142
Configure BFD for OSPFv3.....................................................................................................................................146
Configure BFD for IS-IS........................................................................................................................................... 149
Configure BFD for BGP.............................................................................................................................................151
Configure BFD for VRRP......................................................................................................................................... 157
Configuring Protocol Liveness................................................................................................................................160
Troubleshooting BFD................................................................................................................................................ 160
Chapter 9: Border Gateway Protocol (BGP)............................................................................... 162
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 162
BGP Autonomous Systems......................................................................................................................................162
AS4 Number Representation.................................................................................................................................. 164
Four-Byte AS Numbers............................................................................................................................................ 166
BGP router ID............................................................................................................................................................. 166
Sessions and Peers....................................................................................................................................................166
Establish a Session.................................................................................................................................................... 166
BGP Attributes for selecting Best Path............................................................................................................... 167
Multiprotocol BGP..................................................................................................................................................... 172
BGP global and address family configuration......................................................................................................173
Implement BGP with Dell EMC Networking OS................................................................................................. 174
Configuration Information........................................................................................................................................ 177
Basic BGP configuration tasks......................................................................................................................................177
Prerequisite for configuring a BGP network....................................................................................................... 177
Restrictions..................................................................................................................................................................178
Enabling BGP.............................................................................................................................................................. 178
Enabling four-byte autonomous system numbers............................................................................................. 180
Changing a BGP router ID....................................................................................................................................... 180
Configuring AS4 Number Representations.......................................................................................................... 181
Configuring a BGP peer............................................................................................................................................182
Example-Configuring BGP routing between peers............................................................................................183
BGP peer group..........................................................................................................................................................184
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Contents