Administrator Guide
ACL Remarks..................................................................................................................................................................... 121
Configuring a Remark............................................................................................................................................... 122
Deleting a Remark......................................................................................................................................................122
ACL Resequencing...........................................................................................................................................................123
Resequencing an ACL or Prefix List......................................................................................................................123
Route Maps.......................................................................................................................................................................124
Logging of ACL Processes............................................................................................................................................ 125
Guidelines for Configuring ACL Logging.............................................................................................................. 125
Configuring ACL Logging......................................................................................................................................... 126
Flow-Based Monitoring.................................................................................................................................................. 126
Enabling Flow-Based Monitoring............................................................................................................................128
Chapter 8: Bidirectional Forwarding Detection (BFD)................................................................ 130
How BFD Works...............................................................................................................................................................130
BFD Packet Format....................................................................................................................................................131
BFD Sessions.............................................................................................................................................................. 132
BFD Three-Way Handshake.................................................................................................................................... 133
Session State Changes.............................................................................................................................................134
Important Points to Remember....................................................................................................................................134
Configure BFD.................................................................................................................................................................. 134
Configure BFD for Physical Ports..........................................................................................................................135
Configure BFD for Static Routes........................................................................................................................... 136
Configure BFD for IPv6 Static Routes................................................................................................................. 139
Configure BFD for OSPF.......................................................................................................................................... 141
Configure BFD for OSPFv3.....................................................................................................................................145
Configure BFD for IS-IS............................................................................................................................................147
Configure BFD for BGP............................................................................................................................................149
Configure BFD for VRRP......................................................................................................................................... 156
Configuring Protocol Liveness................................................................................................................................158
Chapter 9: Border Gateway Protocol (BGP)............................................................................... 159
BGP IP version 4 (BGPv4) Overview......................................................................................................................... 159
BGP Autonomous Systems..................................................................................................................................... 159
AS4 Number Representation................................................................................................................................... 161
Four-Byte AS Numbers............................................................................................................................................ 163
BGP router ID............................................................................................................................................................. 163
Sessions and Peers....................................................................................................................................................163
Establish a Session.................................................................................................................................................... 163
BGP Attributes for selecting Best Path............................................................................................................... 164
Multiprotocol BGP..................................................................................................................................................... 169
BGP global and address family configuration......................................................................................................170
Implement BGP with Dell EMC Networking OS.................................................................................................. 171
Configuration Information........................................................................................................................................ 174
Basic BGP configuration tasks..................................................................................................................................... 175
Prerequisite for configuring a BGP network....................................................................................................... 175
Restrictions..................................................................................................................................................................175
Enabling BGP.............................................................................................................................................................. 175
Enabling four-byte autonomous system numbers..............................................................................................177
Changing a BGP router ID........................................................................................................................................178
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Contents