From: John Neiberger (neiby@xxxxxxxxxx)
Date: Thu Apr 04 2002 - 13:24:57 GMT-3
Nevermind. For some reason I was thinking
this was an undocumented 12.1 command but
it's really a 12.2 command and the
explanation in the 12.2 docs is pretty
clear.
John
---- On Thu, 4 Apr 2002, John Neiberger
(neiby@ureach.com) wrote:
> I don't have a way to test this at work.
> Does this actually filter the LSAs from
the
> OSPF database? If so, I thought we
weren't
> allowed to do that. If we _are_ allowed
to
> do this, why not also allow us to use
> distribute-list in with OSPF and ISIS?
>
> Or, does this work similarly to an
incoming
> distribute list where it simply stops
routes
> from being installed locally but still
> allows the LSA to be propagated?
>
> Thanks,
> John
>
> ---- On Thu, 04 Apr 2002, DAN DORTON
> (DHSTS68@dhs.state.il.us) wrote:
>
> > 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 LSAs from area 1.
> >
> > Here is a snip from an example on CCO.
> >
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> > Configuration Examples
> > The following configuration example
output
> shows interarea filtering
> > that is applied 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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