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IP Access Control Lists (ACL), Prefix Lists, and Route-maps | 157
Figure 8-17. Command Example: show config in the ROUTER RIP Mode
To apply a filter to routes in OSPF, use either of the following commands in the ROUTER OSPF mode:
To view the configuration, use the
show config command in the ROUTER OSPF mode (Figure 241) or the
show running-config ospf command in the EXEC mode.
Figure 8-18. Command Example: show config in ROUTER OSPF Mode
ACL Resequencing
Resequencing an ACL or Prefix List is supported on platform e
ACL Resequencing allows you to re-number the rules and remarks in an access or prefix list. The
placement of rules within the list is critical because packets are matched against rules in sequential order.
Use Resequencing whenever there is no longer an opportunity to order new rules as desired using current
numbering scheme.
For example, Table 8-3 contains some rules that are numbered in increments of 1. No new rules can be
placed between these, so apply resequencing to create numbering space, as shown in Table 8-4. In the
same example, apply resequencing if more than two rules must be placed between rules 7 and 10.
Command Syntax Command Mode Purpose
router ospf
CONFIGURATION Enter OSPF mode
distribute-list prefix-list-name in
[interface]
CONFIG-ROUTER-OSPF Apply a configured prefix list to incoming
routes. You can specify an interface.
If you enter the name of a non-existent prefix
list, all routes are forwarded.
distribute-list prefix-list-name out
[connected | rip | static]
CONFIG-ROUTER-OSPF Apply a configured prefix list to incoming
routes. You can specify which type of routes
are affected.
If you enter the name of a non-existent prefix
list, all routes are forwarded.
FTOS(conf-router_rip)#show config
!
router rip
distribute-list prefix juba out
network 10.0.0.0
FTOS(conf-router_rip)#router ospf 34
FTOS(conf-router_ospf)#show config
!
router ospf 34
network 10.2.1.1 255.255.255.255 area 0.0.0.1
distribute-list prefix awe in
FTOS(conf-router_ospf)#