From: Mark Mirrotto (mmirrott@xxxxxxxxxxx)
Date: Wed Aug 04 1999 - 11:06:57 GMT-3
Sorry about the delay - I only have access to a lab once a week.
Instead of using the wildcard mask according to the subnet mask, I noticed
you set the wildcard mask to 0.0.0.0 in the ospf network statement, and the
network statement is set to the interface ip address. I used the mask of
the subnet the address is on, with a wildcard mask that matches the
netmask - ie:
network 172.17.59.0 0.0.0.15 for a .240 subnet mask. I will test it out to
see if it is the cause of this problem.
I have a question, though.... if you setup the network statement to just
match the exact ip address of the interface, would the entire subnet still
be available? I'm sure it wouldn't get advertised...... you could ping all
the local interfaces, but another host on the same subnet would not be
reachable, correct?
Thanks
Mark
-----Original Message-----
From: Fred Ingham <fningham@worldnet.att.net>
To: Mark Mirrotto <mmirrott@stratos.net>
Cc: ccielab@groupstudy.com <ccielab@groupstudy.com>
Date: Sunday, August 01, 1999 8:17 AM
Subject: Re: OSPF summary address problem
>I don't know what you're missing but I could not recreate your problem.
>I configured the setup you described, used the three summary addresses
>you described, and had the three summary routes in the IGRP domain. No
>static routes. All routers could ping all interfaces. Attached are the
>router configurations and the routing tables. Let me know the
>difference between your configurations and the attached.
>
>Another way to insert a default route into IGRP is with the ip
>default-network command.
>
>
>Mark Mirrotto wrote:
>>
>> Hi
>>
>> I apologize for the length of this message, but I think it is necessary
to
>> set up the scenario.
>>
>> R1, R2, and R3 are in a frame relay point-to-multipoint network in subnet
>> 172.17.59.16 / 28 in OSPF area 0
>> R3 R2 share a token ring segment using subnet 172.17.59.128 / 28 in OSPF
>> area 3
>> R1 to R4 are connected via frame-relay point to point and use subnet
>> 172.17.59.0 / 28 in OSPF area 1
>> R4's ethernet segment is in subnet 172.17.59.160 / 30 in OSPF area 2
>> R1's ethernet is in subnet 172.17.59.192 / 29
>> R1 to R5 is a standard serial link and is running IGRP only in subnet
>> 172.17.59.64 / 26
>> I know I need to summarize because of the classful nature of IGRP, so I
>> summarize 172.17.59.0 / 26 ; 172.17.59.128 / 26 and 172.17.59.192 / 26 on
R1
>> and redistribute igrp and ospf mutually - (I used metrics for
>> igrp and subnets for ospf) When I do a 'show ip ospf summary' the subnets
>> all the proper show up summarized, but the 128 subnet has a very high
>> metric, and doesn't^Òt show up on R5. I think this is because R1 's
route to
>> the 128 subnet is a O IA route. I create a static route on R1 with the
128
>> subnet and a 26 bit mask pointing
>> to null 0 and everything works fine. What am I missing? I won't be able
to
>> use a static route in the lab....
>>
>> Thanks!
>>
>> Mark (31 days and counting.....)
>>
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