Connectivity Guide

Table Of Contents
Applying Egress Layer 3 ACLs (Control-Plane)...................................................................................................117
IP Prefix Lists.....................................................................................................................................................................117
Configuration Task List for Prefix Lists................................................................................................................ 118
ACL Remarks..................................................................................................................................................................... 121
Configuring a Remark................................................................................................................................................ 121
Deleting a Remark......................................................................................................................................................122
ACL Resequencing.......................................................................................................................................................... 122
Resequencing an ACL or Prefix List......................................................................................................................123
Route Maps.......................................................................................................................................................................124
Configuring UDF ACL..................................................................................................................................................... 124
Configuring IP Mirror Access Group........................................................................................................................... 126
Sample Configuration................................................................................................................................................127
Example of viewing IP mirroraccessgroup applied to an Interface...........................................................127
Chapter 8: Bidirectional Forwarding Detection (BFD)................................................................ 128
How BFD Works...............................................................................................................................................................128
BFD Packet Format...................................................................................................................................................129
BFD Sessions.............................................................................................................................................................. 130
BFD Three-Way Handshake.....................................................................................................................................131
Session State Changes.............................................................................................................................................132
Important Points to Remember....................................................................................................................................132
Configure BFD.................................................................................................................................................................. 132
Configure BFD for Physical Ports..........................................................................................................................133
Configure BFD for Static Routes........................................................................................................................... 134
Configure BFD for IPv6 Static Routes................................................................................................................. 138
Configure BFD for OSPF......................................................................................................................................... 140
Configure BFD for OSPFv3..................................................................................................................................... 144
Configure BFD for IS-IS........................................................................................................................................... 146
Configure BFD for BGP............................................................................................................................................148
Configure BFD for VRRP......................................................................................................................................... 155
Configuring Protocol Liveness................................................................................................................................157
Chapter 9: Border Gateway Protocol (BGP)............................................................................... 158
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 158
BGP Autonomous Systems..................................................................................................................................... 158
AS4 Number Representation.................................................................................................................................. 160
Four-Byte AS Numbers............................................................................................................................................ 162
BGP router ID............................................................................................................................................................. 162
Sessions and Peers....................................................................................................................................................162
Establish a Session.................................................................................................................................................... 162
BGP Attributes for selecting Best Path............................................................................................................... 163
Multiprotocol BGP..................................................................................................................................................... 168
BGP global and address family configuration..................................................................................................... 169
Implement BGP with Dell EMC Networking OS................................................................................................. 170
Configuration Information........................................................................................................................................ 173
Basic BGP configuration tasks..................................................................................................................................... 174
Prerequisite for configuring a BGP network....................................................................................................... 174
Restrictions..................................................................................................................................................................174
Enabling BGP...............................................................................................................................................................174
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