From: Stephen C. Feldberg (scfeldberg@xxxxxxxxxxx)
Date: Tue Apr 16 2002 - 12:47:55 GMT-3
IOS behavior < 12.1 was different regarding OSPF redistribution. That was
then, this is now. If you are not allowed to create an ABR, your only other
option is to redistribute the routes into another classless protocol (ie
another OSPF instance), summarization can then occur using the
summary-address command for the redistribution back INTO the original OSPF
process. Do not rely on static routes, assume they will not be permitted.
Steve
----- Original Message -----
From: "Tarek Sabry" <tsabry@houston.sns.slb.com>
To: "'Muhamamd Durrani'" <dan_schaw@yahoo.com>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, April 16, 2002 11:10 AM
Subject: RE: OSPF - IGRP
> Muhammad
>
> Thanks for your reply.
>
> I fully agree that summary-address is for injecting a summary INTO OSPF
and
> not to redistribute into another protocol. But I've seen people using it
> otherwise :( Is this IOS-related?
>
> How can I create area-range when the router I'm trying to redistribute at
is
> not an ABR? I only have area-1 and IGRP on this router.
>
> Creating statics is also prohibited in the lab. Right?
>
> Thanks again
> Tarek
>
> -----Original Message-----
> From: Muhamamd Durrani [mailto:dan_schaw@yahoo.com]
> Sent: Tuesday, April 16, 2002 8:56 AM
> To: Tarek Sabry
> Cc: ccielab@groupstudy.com
> Subject: Re: OSPF - IGRP
>
>
> Hi Tarek ,
>
> With Summary-Address you cannot re-distribute to other
> routing protocol . Its for the Summary Address for
> Ecternal Routes .
>
> I would rather say create a Summary Address with "Area
> range " commad on the router you want to summarized
> the addresses on, with the mask configured on the
> interfaces running IGRP. If the mask is now same as
> configured on IGRP interfaces than you wil not see the
> route on IGRP router .
>
> Another way that I could see is to create a static
> route on ASBR to NULL 0 and redistribute static into
> IGRP process ..but again the mask SHOULD match with
> interaces configured with IGRP .
>
>
> Let me know id I am wrong .
>
> Regards,
> Muhammad
>
>
> --- Tarek Sabry <tsabry@houston.sns.slb.com> wrote:
> > Hi
> >
> > I understand that there may be more than one way to
> > redistribute VLSM into
> > FLSM. However the only way that seems to work for me
> > when redistributing
> > OSPF into IGRP is the brilliant method suggested by
> > someone a little while
> > back, whereby I need to create an intermediate OSPF
> > process. I don't feel
> > comfortable with just this way though, because the
> > proctors may object to
> > it.
> >
> > So let's say we have a /26 network connected to the
> > OSPF side of the
> > redistributing router. Someone had suggested before
> > that a good way of
> > achieveing what I want would be to redistribute
> > connected into OSPF and
> > create a "summary-address" of a /24, and this route
> > would be redistributed
> > into IGRP with the rest of the OSPF routes.
> >
> > Is that supposed to work??? Well doesn't the
> > "summary-address" inject a
> > route INTO OSPF and not OUT OF it?? Also how come I
> > do not see any routes to
> > "Null 0" after I create my OSPF summary address?
> >
> > What are common gotchas for OSPF summaries??
> >
> > Thanks a lot
> > Tarek
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:58:09 GMT-3