Administrator Guide
ACL Remarks.......................................................................................................................................................................117
Configuring a Remark...................................................................................................................................................118
Deleting a Remark.........................................................................................................................................................118
ACL Resequencing............................................................................................................................................................. 119
Resequencing an ACL or Prefix List...........................................................................................................................119
Route Maps........................................................................................................................................................................ 120
Logging of ACL Processes............................................................................................................................................... 120
Guidelines for Configuring ACL Logging.................................................................................................................... 121
Configuring ACL Logging............................................................................................................................................ 122
Flow-Based Monitoring..................................................................................................................................................... 122
Enabling Flow-Based Monitoring................................................................................................................................123
8 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...................................................................................................................... 134
Configure BFD for OSPF............................................................................................................................................ 136
Configure BFD for OSPFv3........................................................................................................................................ 139
Configure BFD for IS-IS...............................................................................................................................................142
Configure BFD for BGP...............................................................................................................................................144
Configure BFD for VRRP.............................................................................................................................................151
Configuring Protocol Liveness....................................................................................................................................153
9 Border Gateway Protocol (BGP).................................................................................................154
BGP IP version 4 (BGPv4) Overview..............................................................................................................................154
BGP Autonomous Systems.........................................................................................................................................154
AS4 Number Representation......................................................................................................................................156
Four-Byte AS Numbers...............................................................................................................................................158
BGP router ID............................................................................................................................................................... 158
Sessions and Peers...................................................................................................................................................... 158
Establish a Session.......................................................................................................................................................158
BGP Attributes for selecting Best Path....................................................................................................................159
Multiprotocol BGP....................................................................................................................................................... 164
BGP global and address family configuration...........................................................................................................165
Implement BGP with Dell EMC Networking OS...................................................................................................... 166
Configuration Information...........................................................................................................................................169
Basic BGP configuration tasks.........................................................................................................................................169
Prerequisite for configuring a BGP network............................................................................................................ 169
Restrictions...................................................................................................................................................................169
Enabling BGP................................................................................................................................................................169
Enabling four-byte autonomous system numbers.................................................................................................... 171
Changing a BGP router ID...........................................................................................................................................172
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