Users Guide

Counting ACL Hits......................................................................................................................................................121
Configure Ingress ACLs.................................................................................................................................................. 121
Configure Egress ACLs................................................................................................................................................... 121
Applying Egress Layer 3 ACLs (Control-Plane)..................................................................................................122
Configuring UDF ACL..................................................................................................................................................... 123
IP Prefix Lists....................................................................................................................................................................125
Configuration Task List for Prefix Lists................................................................................................................125
ACL Remarks.................................................................................................................................................................... 129
Configuring a Remark............................................................................................................................................... 129
Deleting a Remark......................................................................................................................................................129
ACL Resequencing.......................................................................................................................................................... 130
Resequencing an ACL or Prefix List......................................................................................................................130
Route Maps........................................................................................................................................................................131
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 IPv6 Static Routes................................................................................................................. 143
Configure BFD for OSPF......................................................................................................................................... 145
Configure BFD for OSPFv3.....................................................................................................................................150
Configure BFD for IS-IS........................................................................................................................................... 153
Configure BFD for BGP............................................................................................................................................155
Configure BFD for VRRP.......................................................................................................................................... 161
Configuring Protocol Liveness................................................................................................................................164
Chapter 9: Border Gateway Protocol (BGP)............................................................................... 165
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 165
BGP Autonomous Systems..................................................................................................................................... 165
AS4 Number Representation...................................................................................................................................167
Four-Byte AS Numbers............................................................................................................................................ 169
BGP router ID............................................................................................................................................................. 169
Sessions and Peers....................................................................................................................................................169
Establish a Session.................................................................................................................................................... 169
BGP Attributes for selecting Best Path............................................................................................................... 170
Multiprotocol BGP..................................................................................................................................................... 175
BGP global and address family configuration......................................................................................................176
Implement BGP with Dell EMC Networking OS..................................................................................................177
Configuration Information........................................................................................................................................180
Basic BGP configuration tasks..................................................................................................................................... 180
Prerequisite for configuring a BGP network....................................................................................................... 180
Restrictions.................................................................................................................................................................. 181
Enabling BGP............................................................................................................................................................... 181
6
Contents