Administrator Guide

Applying Egress Layer 3 ACLs (Control-Plane)........................................................................................................116
IP Prefix Lists...................................................................................................................................................................... 116
Configuration Task List for Prefix Lists......................................................................................................................117
ACL Remarks......................................................................................................................................................................120
Configuring a Remark..................................................................................................................................................120
Deleting a Remark........................................................................................................................................................120
ACL Resequencing............................................................................................................................................................. 121
Resequencing an ACL or Prefix List........................................................................................................................... 121
Route Maps........................................................................................................................................................................ 122
Configuring UDF ACL........................................................................................................................................................ 123
Configuring IP Mirror Access Group................................................................................................................................125
Sample Configuration.................................................................................................................................................. 125
Example of viewing IP mirror–access–group applied to an Interface...................................................................126
8 Bidirectional Forwarding Detection (BFD)................................................................................... 127
How BFD Works.................................................................................................................................................................127
BFD Packet Format..................................................................................................................................................... 128
BFD Sessions................................................................................................................................................................ 129
BFD Three-Way Handshake....................................................................................................................................... 130
Session State Changes................................................................................................................................................ 131
Important Points to Remember........................................................................................................................................ 131
Configure BFD.....................................................................................................................................................................131
Configure BFD for Physical Ports.............................................................................................................................. 132
Configure BFD for Static Routes............................................................................................................................... 133
Configure BFD for IPv6 Static Routes...................................................................................................................... 136
Configure BFD for OSPF.............................................................................................................................................138
Configure BFD for OSPFv3........................................................................................................................................ 142
Configure BFD for IS-IS...............................................................................................................................................144
Configure BFD for BGP...............................................................................................................................................146
Configure BFD for VRRP............................................................................................................................................ 153
Configuring Protocol Liveness................................................................................................................................... 155
9 Border Gateway Protocol (BGP)................................................................................................ 156
BGP IP version 4 (BGPv4) Overview............................................................................................................................. 156
BGP Autonomous Systems........................................................................................................................................ 156
AS4 Number Representation......................................................................................................................................158
Four-Byte AS Numbers...............................................................................................................................................160
BGP router ID............................................................................................................................................................... 160
Sessions and Peers...................................................................................................................................................... 160
Establish a Session.......................................................................................................................................................160
BGP Attributes for selecting Best Path.....................................................................................................................161
Multiprotocol BGP....................................................................................................................................................... 166
BGP global and address family configuration........................................................................................................... 167
Implement BGP with Dell EMC Networking OS...................................................................................................... 168
Configuration Information............................................................................................................................................ 171
Basic BGP configuration tasks..........................................................................................................................................171
Prerequisite for configuring a BGP network..............................................................................................................171
Restrictions.................................................................................................................................................................... 171
Enabling BGP.................................................................................................................................................................171
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