From: router0160 (router0160@xxxxxxxxxxx)
Date: Mon Aug 06 2001 - 06:39:37 GMT-3
I've another problem to use "summary-address" to summary ospf router to create
summary ospf routes with "NULL 0" and then redistribute to IGRP. It seems to be
work on 11.3.x but not in 12.0.x. Can anyone advise it's new feature set? How
can I change the required ospf routes (different subnet mask with IGRP) to redi
stirbute into IGRP if I can't do "summary-address" to be same subnet mask of IG
RP?
Rol
>You need to be careful with this one. I have done the 501 lab and I know
>that the solution is to use summary addresses. You should always try area
>ranges first. I am not sure why the area ranges don't work here, I suspect
>that it has something to do with the virtual link. The route is learned by
>IGRP because it goes through the RIP domain. Try turning off the token ring
>interfaces that have RIP running over them and see if you still get your
>frame relay network in IGRP.
>
>Paul
>----- Original Message -----
>From: "Daniel C. Young" <danyoung99@mediaone.net>
>To: "'Padhu (LFG)'" <padhu@steinroe.com>; <ccielab@groupstudy.com>
>Sent: Sunday, August 05, 2001 7:51 PM
>Subject: ospf: reverse summary-address usage
>
>
>> Group,
>>
>> Backgound: Some of you have advocated the use of reverse summary-address
>to
>> solve the VLSM/FLSM issue. That is, instead of using summary-address to
>> summarize external routes going into OSPF, you can use it to summarize
>ospf
>> routes into external routing domains.
>>
>> Testbed: Fatkid labs 502 and 501.
>>
>> 501 has a /28 ospf subnet that a rip domain needs to see. I configured the
>> summary-address statement to convert it to a /24 mask on r3, who is the
>ASBR
>> for the rip domain. Works great!
>>
>> 502 has a /22 ospf subnet that an igrp domain needs to see.
>Summary-address
>> did not anywhere, except on a separate ospf process on r2, who is the ASBR
>> for the other ospf process. This created another problem where the longest
>> matching rule preffered the "summary" route to the null0. Nonetheless, the
>> summary-address itself worked.
>>
>> Conclusion: Normal summary-address can summarize for longer-mask networks.
>> Reverse summary-address can summarize for shorter-mask networks in rip.
>> Reverse summary-address does not work for longer-mask networks in igrp.
>>
>> Question: Does reverse summary-address work for shorter-mask network igrp
>as
>> well? Can you perform a reverse summary-address for longer-mask networks
>in
>> rip?
>>
>> Regards,
>> Daniel
>> **Please read:http://www.groupstudy.com/list/posting.html
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