From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Fri Dec 14 2001 - 01:10:26 GMT-3
This appears to be a solution designed for when the OSPF subnet is smaller,
such as getting a /28 from OSPF to a /24 in IGRP, and they are not part of
the same classful network. This works no problem for me using either the
summary-address or area range command, thanks for the link.
I am trying to put a route of 147.1.77.0/24, which is a subset of the
147.1.76.0/22 that is actually on the interface. It might help if I give a
more detailed explanation.
I have a frame cloud, each interface on the frame cloud is 147.1.77.x/22,
these are in OSPF. I have an IGRP router connected to one of the OSPF
routers, it's interface IP is 147.1.5.1/24. So, the OSPF router will not
send 147.1.76.0/22 down to the IGRP neighbor because the subnet mask is
larger than that on the IGRP interface and they are part of the same major
network. I tried making the ospf router an ABR and using area range, still
doesn't work, I have tried it using 147.1.77.0/24, and 147.1.64.0/19,
neither of them get advertised to the IGRP router. Anyone know of a way to
get these routes in if they are part of the same major network? This would
break one of the rules of IGRP, so I am wondering if it can be done, this is
from a fatkid.com lab that gives the solution as the summary-address
command, which doesn't work in recent IOS. Thanks.
-----Original Message-----
From: EA Louie
To: Lupi, Guy; ccielab@groupstudy.com
Sent: 12/13/2001 8:53 PM
Subject: Re: OSPF to IGRP redistribution
Steve Feldberg gave us an elegant solution using 'area range' and the
only
catch was the introduction of an additional area (making the ASBR an ABR
as
well). The summary-address command works okay in 12.0, but not in 12.1,
and
apparently, not in 12.2 either.
here's the link
http://www.groupstudy.com/archives/ccielab/200112/msg00148.html (watch
the
URL wrap)
----- Original Message -----
From: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, December 13, 2001 5:14 PM
Subject: OSPF to IGRP redistribution
> Ok, before I start I have searched the archives and found 2 solutions,
one
> works in my lab and one does not. Here is the setup, one router
running
> OSPF and IGRP, it is an ASBR. One router running IGRP only. One of
the
> interfaces on the ASBR is in 147.1.76.0/22, the interface connected to
the
> IGRP router is in 147.1.5.0/24. Now I know that because they are part
of
> the same classful network and the subnets are not the same the OSPF
router
> will not advertise the 147.1.76.0/22 network. I found 2 solutions to
this,
> a "summary-address 147.1.77.0 255.255.255.0" in the OSPF config which
does
> not seem to work for me, and the other solution is a route map on the
IGRP
> only router specifying the next hop address for the networks that I am
> trying to reach. While the route map works, it does not put the
routes in
> the routing table on the IGRP router. I have heard that on some IOS
> versions the summary address command does not work for redistribution,
I
am
> running 12.2(1b) on both routers. Sorry to open this can of worms
again,
> any help is, as always, appreciated.
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