Deployment Guide

Table Of Contents
Example of viewing IP mirroraccessgroup applied to an Interface.......................................................... 124
Chapter 7: Bidirectional Forwarding Detection (BFD).................................................................125
How BFD Works...............................................................................................................................................................125
BFD Packet Format...................................................................................................................................................126
BFD Sessions...............................................................................................................................................................127
BFD Three-Way Handshake.................................................................................................................................... 128
Session State Changes.............................................................................................................................................129
Important Points to Remember....................................................................................................................................129
Configure BFD.................................................................................................................................................................. 129
Configure BFD for Physical Ports..........................................................................................................................130
Configure BFD for Static Routes............................................................................................................................131
Configure BFD for IPv6 Static Routes................................................................................................................. 135
Configure BFD for OSPF..........................................................................................................................................137
Configure BFD for OSPFv3......................................................................................................................................141
Configure BFD for IS-IS........................................................................................................................................... 144
Configure BFD for BGP............................................................................................................................................146
Configure BFD for VRRP......................................................................................................................................... 152
Configuring Protocol Liveness................................................................................................................................155
Chapter 8: 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..................................................................................................................................... 172
Prerequisite for configuring a BGP network....................................................................................................... 172
Restrictions..................................................................................................................................................................172
Enabling BGP...............................................................................................................................................................172
Enabling four-byte autonomous system numbers..............................................................................................174
Changing a BGP router ID....................................................................................................................................... 175
Configuring AS4 Number Representations..........................................................................................................175
Configuring a BGP peer............................................................................................................................................176
Example-Configuring BGP routing between peers............................................................................................ 177
BGP peer group..........................................................................................................................................................178
Advanced BGP configuration tasks.............................................................................................................................185
Route-refresh and Soft-reconfiguration..............................................................................................................185
Aggregating Routes...................................................................................................................................................187
Filtering BGP...............................................................................................................................................................189
Configuring BGP Fast Fall-Over.............................................................................................................................194
Configuring Passive Peering................................................................................................................................... 196
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Contents