From: Bryan Ginman (ginmanb@xxxxxxxxxxx)
Date: Fri Dec 21 2001 - 20:07:19 GMT-3
Well I just did a test on 3 routers running in a frame cloud
(R5(multipoint)---R2, R5---R3) running OSPF area 0 w/28, then R3(Token
Ring)---R4 running RIP1 w/24. Ran a area 0 range to make it into a /24 and
redist into rip.
Finding : No Dice on 12.1(11)
it redist' the /32 for the multipoint addresses but does not so on the
summary. I was pretty sure of this but this confirms it.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Kirby, Ron
Sent: Friday, December 21, 2001 2:53 PM
To: ccielab@groupstudy.com
Subject: RE: OSPF to IGRP redistrib - How to summarize area 0 routes?
My redistribution router is running "System image file is
"flash:c3620-js-mz.121-11.bin""
Ron Kirby
CCNP, MCSE, CNA
Network Engineer
Getronics, Houston ESC
713-852-5567 / 832-256-5403
ron.kirby@getronics.com
This e-mail message and any attachments are confidential and may be
privileged. If you are not the intended recipient, please notify me
immediately by replying to this message and please destroy all copies of
this message and attachments. Thank you.
-----Original Message-----
From: tom cheung [mailto:tkc9789@hotmail.com]
Sent: Friday, December 21, 2001 1:20 PM
To: Ron.Kirby@getronics.com; tlarus@mwc.edu; ccielab@groupstudy.com
Subject: RE: OSPF to IGRP redistrib - How to summarize area 0 routes?
Ron,
The area range for area 0 only works on older IOS. I don't that works on
12.1, which is IOS in the lab now.
Tom
>From: "Kirby, Ron" <Ron.Kirby@getronics.com>
>Reply-To: "Kirby, Ron" <Ron.Kirby@getronics.com>
>To: "'Thomas Larus'" <tlarus@mwc.edu>, ccielab@groupstudy.com
>Subject: RE: OSPF to IGRP redistrib - How to summarize area 0 routes?
>Date: Fri, 21 Dec 2001 12:33:30 -0500
>
>The "area range" command will summarize a backbone net into an IGRP AS. I
>did a lab similar to this 2 days ago. The IGRP AS was a /24 and the frame
>network, which was the ospf area 0 was a /28. I also had /32's from some
>loopbacks that had to go into the IGRP AS as well. I played with various
>ways to do it. First, I had a Class C network hanging off another router,
>so I created a default route to that classful network on the IGRP-only
>router and I could ping everything in the OSPF system, even though the
>frame
>and loopback addresses were not in the routing table. I suspect this would
>not be acceptable though, as this is a "default-route", it just doesn't use
>the quad-zero entry in the routing table, but it does work. Next I added
>the "ip ospf network type" command to the loopbacks and used the "area
>range" command at the redistribution point, summarizing the /28 to a /24.
>The loopbacks appeared at the IGRP router as /24s, but not the /28s. I had
>to add the null route to the config on the redistribution router (as
>explained by Doyle in V1) and then it worked fine, both the loopbacks and
>the frame network (as a /24) was in the IGRP routing table. But is that a
>technical no-no, as it involves a "static route"? If this is a no-no, what
>else can you do to get /28s into an IGRP AS using a /24??
>
>Ron Kirby
>CCNP, MCSE, CNA
>Network Engineer
>Getronics, Houston ESC
>713-852-5567 / 832-256-5403
>ron.kirby@getronics.com
>
>This e-mail message and any attachments are confidential and may be
>privileged. If you are not the intended recipient, please notify me
>immediately by replying to this message and please destroy all copies of
>this message and attachments. Thank you.
>
>
>
>
>
>-----Original Message-----
>From: Thomas Larus [mailto:tlarus@mwc.edu]
>Sent: Friday, December 21, 2001 11:10 AM
>To: ccielab@groupstudy.com
>Subject: OSPF to IGRP redistrib - How to summarize area 0 routes?
>
>
>I am working on basic everyday OSPF to IGRP redistribution. I was able
>to use area range for the routes I needed to get down to /24 to match
>the IGRP domains mask. But what if the scenario had been set up
>differently, and I had had routes within area 0 that had to be
>summarized to /24 to be redisted into IGRP? Area range summarizes
>non-backbone areas INTO area 0. Summary-address only works on routes
>redistributed INTO the OSPF domain. The experts all say that there are
>two way to deal with the classless to classful redist problemstatic
>routes and summarization. If it is stated that I cannot use static
>routes, and the routes I need to summarize are within area 0, what do I
>do?
>
>I can design the network to make sure all the routes that need to be
>redistributed from OSPF to a classfull routing protocol are in an area
>other than 0, but what if I am given the situation I have set out?
>
>A route-map comes to mind, but I dont see how I can summarize using a
>route-map, although I can make it so that only routes with a certain
>mask get redistributed.
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