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Implementation Information...................................................................................................... 109
Configuration Task List for Prefix Lists.......................................................................................109
ACL Resequencing.............................................................................................................................113
Resequencing an ACL or Prefix List............................................................................................ 113
Route Maps........................................................................................................................................ 115
Implementation Information.......................................................................................................115
Important Points to Remember........................................................................................................ 115
Configuration Task List for Route Maps......................................................................................115
Configuring Match Routes.......................................................................................................... 118
Configuring Set Conditions.........................................................................................................119
Configure a Route Map for Route Redistribution...................................................................... 120
Configure a Route Map for Route Tagging................................................................................ 121
Continue Clause.......................................................................................................................... 121
7 Bare Metal Provisioning (BMP)....................................................................... 123
Enhanced Behavior of the stop bmp Command.............................................................................123
Removal of User-Defined String Parameter in the reload-type Command...................................123
Service Tag Information in the Option 60 String.............................................................................123
8 Bidirectional Forwarding Detection (BFD).................................................. 124
How BFD Works................................................................................................................................ 124
BFD Packet Format......................................................................................................................125
BFD Sessions................................................................................................................................127
BFD Three-Way Handshake........................................................................................................127
Session State Changes................................................................................................................128
Important Points to Remember........................................................................................................129
Configure BFD...................................................................................................................................129
Configure BFD for Static Routes.................................................................................................130
Configure BFD for OSPF..............................................................................................................131
Configure BFD for OSPFv3..........................................................................................................135
Configure BFD for IS-IS...............................................................................................................136
Configure BFD for BGP...............................................................................................................139
Configure BFD for VRRP............................................................................................................. 146
Configuring Protocol Liveness................................................................................................... 149
9 Border Gateway Protocol IPv4 (BGPv4).......................................................150
Autonomous Systems (AS)................................................................................................................150
Sessions and Peers............................................................................................................................152
Establish a Session.......................................................................................................................153
Route Reflectors................................................................................................................................153
Communities...............................................................................................................................154
BGP Attributes................................................................................................................................... 154