Administrator Guide
IP Prefix Lists.......................................................................................................................................................................114
Configuration Task List for Prefix Lists......................................................................................................................115
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........................................................................................................................................ 138
Configure BFD for IS-IS............................................................................................................................................... 141
Configure BFD for BGP...............................................................................................................................................143
Configure BFD for VRRP............................................................................................................................................ 150
Configuring Protocol Liveness....................................................................................................................................152
9 Border Gateway Protocol (BGP).................................................................................................153
BGP IP version 4 (BGPv4) Overview..............................................................................................................................153
BGP Autonomous Systems.........................................................................................................................................153
AS4 Number Representation......................................................................................................................................155
Four-Byte AS Numbers............................................................................................................................................... 157
BGP router ID............................................................................................................................................................... 157
Sessions and Peers...................................................................................................................................................... 157
Establish a Session.......................................................................................................................................................157
BGP Attributes for selecting Best Path....................................................................................................................158
Multiprotocol BGP....................................................................................................................................................... 163
BGP global and address family configuration........................................................................................................... 164
Implement BGP with Dell EMC Networking OS...................................................................................................... 165
Configuration Information........................................................................................................................................... 168
Basic BGP configuration tasks.........................................................................................................................................168
Prerequisite for configuring a BGP network.............................................................................................................168
Restrictions................................................................................................................................................................... 168
Enabling BGP................................................................................................................................................................168
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