Configuring
Filters Without a Sequence Number
................................................................................................
109
Configure
Layer 2 and Layer 3 ACLs
............................................................................................................................
110
Assign an IP ACL to an Interface
...................................................................................................................................
110
Applying an IP ACL
..........................................................................................................................................................
111
Counting ACL Hits
.....................................................................................................................................................
111
Configure
Ingress ACLs
..................................................................................................................................................
112
Configure
Egress ACLs
...................................................................................................................................................
112
Applying Egress Layer 3 ACLs (Control-Plane)
.....................................................................................................
113
IP
Prefix
Lists
...................................................................................................................................................................
113
Implementation Information
.....................................................................................................................................
114
Configuration
Task List for
Prefix
Lists
...................................................................................................................
114
ACL Resequencing
..........................................................................................................................................................
117
Resequencing an ACL or
Prefix
List
........................................................................................................................
118
Route Maps
......................................................................................................................................................................
119
Implementation Information
.....................................................................................................................................
119
Important Points to Remember
.....................................................................................................................................
119
Configuration
Task List for Route Maps
................................................................................................................
120
Configuring
Match Routes
......................................................................................................................................
122
Configuring
Set Conditions
.....................................................................................................................................
123
Configure
a Route Map for Route Redistribution
.................................................................................................
124
Configure
a Route Map for Route Tagging
............................................................................................................
124
Continue Clause
........................................................................................................................................................
125
Logging of ACL Processes
............................................................................................................................................
125
Guidelines for
Configuring
ACL Logging
................................................................................................................
126
Configuring
ACL Logging
.........................................................................................................................................
126
Flow-Based Monitoring Support for ACLs
..................................................................................................................
127
Behavior of Flow-Based Monitoring
.......................................................................................................................
127
Enabling Flow-Based Monitoring
............................................................................................................................
128
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
............................................................................................................................................
135
Important Points to Remember
....................................................................................................................................
135
Configure
BFD
................................................................................................................................................................
135
Configure
BFD for Physical Ports
...........................................................................................................................
136
Configure
BFD for Static Routes
............................................................................................................................
139
Configure
BFD for OSPF
..........................................................................................................................................
141
Configure
BFD for OSPFv3
.....................................................................................................................................
143
Configure
BFD for IS-IS
...........................................................................................................................................
145
Configure
BFD for BGP
...........................................................................................................................................
147
Configure
BFD for VRRP
.........................................................................................................................................
154
Configuring
Protocol Liveness
................................................................................................................................
156
Troubleshooting BFD
................................................................................................................................................
156
6
Contents