Reference Guide

Configure a Route Map for Route Tagging................................................................................145
Continue Clause..........................................................................................................................146
Logging of ACL Processes................................................................................................................146
Guidelines for Configuring ACL Logging....................................................................................147
Configuring ACL Logging........................................................................................................... 148
Flow-Based Monitoring Support for ACLs.......................................................................................148
Behavior of Flow-Based Monitoring...........................................................................................149
Enabling Flow-Based Monitoring................................................................................................151
9 Bidirectional Forwarding Detection (BFD).....................................................153
How BFD Works................................................................................................................................ 153
BFD Packet Format......................................................................................................................154
BFD Sessions................................................................................................................................156
BFD Three-Way Handshake........................................................................................................156
Session State Changes.................................................................................................................157
Important Points to Remember........................................................................................................158
Configure BFD...................................................................................................................................158
Configure BFD for Physical Ports............................................................................................... 159
Configure BFD for Static Routes.................................................................................................162
Configure BFD for OSPF............................................................................................................. 164
Configure BFD for OSPFv3..........................................................................................................167
Configure BFD for IS-IS...............................................................................................................168
Configure BFD for BGP................................................................................................................171
Configure BFD for VRRP..............................................................................................................178
Configuring Protocol Liveness....................................................................................................181
Troubleshooting BFD...................................................................................................................181
10 Border Gateway Protocol IPv4 (BGPv4)....................................................... 183
Autonomous Systems (AS)................................................................................................................183
Sessions and Peers............................................................................................................................185
Establish a Session.......................................................................................................................186
Route Reflectors................................................................................................................................186
BGP Attributes................................................................................................................................... 187
Best Path Selection Criteria........................................................................................................ 188
Weight..........................................................................................................................................190
Local Preference......................................................................................................................... 190
Multi-Exit Discriminators (MEDs)................................................................................................ 191
Origin........................................................................................................................................... 192
AS Path.........................................................................................................................................193
Next Hop......................................................................................................................................193
Multiprotocol BGP............................................................................................................................ 194
Implement BGP with Dell Networking OS.......................................................................................194