From: DAN DORTON (DHSTS68@xxxxxxxxxxxxxxx)
Date: Thu Apr 04 2002 - 12:03:32 GMT-3
Note that "prefix-list AREA_1" is specified.
in other words they are using an ip prefix-list named AREA_1 to filter type 3 L
SAs from area 1.
Here is a snip from an example on CCO.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Configuration Examples
The following configuration example output shows interarea filtering that is ap
plied to both incoming and outgoing routes:
Router(config)# router ospf 1
log-adjacency-changes
area 1 filter-list prefix AREA_1_OUT out
area 3 filter-list prefix AREA_3_IN in
network 10.0.0.0 0.255.255.255 area 3
network 172.16.1.0 0.0.0.255 area 0
network 192.168.0.0 0.255.255.255 area 1
!
ip prefix-list AREA_1_OUT seq 10 permit 10.25.0.0/8 ge 16
ip prefix-list AREA_1_OUT seq 20 permit 172.20.20.0/24
!
ip prefix-list AREA_3_IN seq 10 permit 172.31.0.0/16
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>> "peter brown" <pita40@hotmail.com> 04/04/02 02:30PM >>>
I want to know under what situation would you use this command in ospf. I
know it is used to filter type 3 lsa from an area. Also do you need to write
an access-list to be referenced. The example in CCO did not have an
access-list associated with it. The command is
"area 1 filter-list prefix-list AREA_1" in/out
Please help
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