Deployment Guide

Example of viewing IP mirror–access–group applied to an Interface.......................................................... 125
Chapter 7: Bidirectional Forwarding Detection (BFD).................................................................126
How BFD Works...............................................................................................................................................................126
BFD Packet Format................................................................................................................................................... 127
BFD Sessions.............................................................................................................................................................. 128
BFD Three-Way Handshake.................................................................................................................................... 129
Session State Changes.............................................................................................................................................130
Important Points to Remember....................................................................................................................................130
Configure BFD..................................................................................................................................................................130
Configure BFD for Physical Ports...........................................................................................................................131
Configure BFD for Static Routes........................................................................................................................... 132
Configure BFD for IPv6 Static Routes................................................................................................................. 136
Configure BFD for OSPF..........................................................................................................................................138
Configure BFD for OSPFv3..................................................................................................................................... 142
Configure BFD for IS-IS........................................................................................................................................... 145
Configure BFD for BGP............................................................................................................................................ 147
Configure BFD for VRRP......................................................................................................................................... 153
Configuring Protocol Liveness................................................................................................................................156
Chapter 8: Border Gateway Protocol (BGP)............................................................................... 157
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 157
BGP Autonomous Systems......................................................................................................................................157
AS4 Number Representation.................................................................................................................................. 159
Four-Byte AS Numbers............................................................................................................................................. 161
BGP router ID.............................................................................................................................................................. 161
Sessions and Peers.................................................................................................................................................... 161
Establish a Session..................................................................................................................................................... 161
BGP Attributes for selecting Best Path............................................................................................................... 162
Multiprotocol BGP..................................................................................................................................................... 167
BGP global and address family configuration......................................................................................................168
Implement BGP with Dell EMC Networking OS................................................................................................. 169
Configuration Information........................................................................................................................................ 172
Basic BGP configuration tasks..................................................................................................................................... 173
Prerequisite for configuring a BGP network....................................................................................................... 173
Restrictions..................................................................................................................................................................173
Enabling BGP...............................................................................................................................................................173
Enabling four-byte autonomous system numbers..............................................................................................175
Changing a BGP router ID........................................................................................................................................176
Configuring AS4 Number Representations..........................................................................................................176
Configuring a BGP peer............................................................................................................................................177
Example-Configuring BGP routing between peers............................................................................................ 178
BGP peer group..........................................................................................................................................................179
Advanced BGP configuration tasks.............................................................................................................................186
Route-refresh and Soft-reconfiguration..............................................................................................................186
Aggregating Routes...................................................................................................................................................188
Filtering BGP...............................................................................................................................................................190
Configuring BGP Fast Fall-Over.............................................................................................................................195
Configuring Passive Peering....................................................................................................................................197
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Contents