From: kym blair (kymblair@xxxxxxxxxxx)
Date: Sun Oct 28 2001 - 03:37:12 GMT-3
Yorgos,
Your suggestion to create a static of the /25 connected using /24 to null0
so it matches the /24 IGRP interface to redistribute into worked great.
Thanks.
Kym
>From: "Yorgos Katsikogiannis" <gkats@algosystems.gr>
>Reply-To: "Yorgos Katsikogiannis" <gkats@algosystems.gr>
>To: "'Ravi'" <s_ravichandran@hotmail.com>, "'kym blair'"
><kymblair@hotmail.com>, <w.schoots@chello.nl>,
><ccielab@groupstudy.com>
>Subject: RE: SOLUTION: OSPF Summary-Address (for redistrib into IGRP)
>Date: Mon, 22 Oct 2001 19:32:21 +0300
>
>Hi Ravi,
>
>there is one more thing that you possibly could do to overcome this.
>
>You could create a static route of your *connected interface* using the
>major network subnet of the IGRP to a null interface (i.e if your IGRP
>is using /24, then you will have to use ip route xx.xx.xx.xx
>255.255.255.0 null0 ) and then redistribute this static route into your
>IGRP routing protocol.
>
>You may check see that your routes are now advertised correct, but the
>bother is that you cannot use this kind of solution under lab
>circumstances.
>
>Yorgos
>
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Ravi
>Sent: Monday, October 22, 2001 7:02 PM
>To: kym blair; w.schoots@chello.nl; ccielab@groupstudy.com
>Subject: Re: SOLUTION: OSPF Summary-Address (for redistrib into IGRP)
>
>
>Hi Kym,
>
>If the connected interface that you are talking about is not in area 0 ,
>you may still use area range command on the other side of the link. OR
>You can do redis connected and use summary address. It works up to IOS
>12.0.
>
>I found problem when I used the same command on IOS 12.1. It does not
>redistribute the connected interface if the interface is already in any
>of the ospf area. It works for any interface which are not in any
>routing process. Try by using secondary address to overcome this
>problem.
>
>Any one has better solution please add.
>
>Regards,
>Ravi
>
>
>----- Original Message -----
>From: kym blair <kymblair@hotmail.com>
>To: <w.schoots@chello.nl>; <ccielab@groupstudy.com>
>Sent: Monday, October 22, 2001 8:54 AM
>Subject: SOLUTION: OSPF Summary-Address (for redistrib into IGRP)
>
>
> > Willy's solution to use area range at the ABR before the ASBR worked;
> > both became OSPF IA /24 networks and redistributed into IGRP:
> >
> > >If you would use an area range command on R5, then it should work:
> > >area 0 range 152.1.1.0 255.255.255.0 area 0 range 152.1.2.0
> > >255.255.255.0
> >
> > Ravi's comment explains:
> >
> > Your R6 (ASBR between OSPF and IGRP) routing table shows both the
> > network
>as
> > IA entry. To summarize a IA route, you can use area range command on
> > ABRs. Summary address to summarize routes learned from another routing
>
> > process, and to be used on ASBRs. As your routes are IA routes,
> > summary address
>will
> > not work.
> >
> > Thanks for the help; also thanks to those who offered to recreate this
>
> > scenario on their labs.
> >
> > ***** This leads to one more question: ******
> >
> > If we had a directly connected interface on R6 (ASBR) with a /25 mask,
>
> > how would we summarize to a /24 to get it into IGRP (static works, but
>
> > for
>this
> > scenario cannot be used)? It wouldn't be an OSPF IA route, so we
> > couldn't use area range at the previous ABR, and summary-address
> > doesn't work (I tried).
> >
> > Kym
> >
> >
> >
> >
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