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Webcast-Catalyst9k
New Member

ospf summary address and igrp redistribution

I have the following addresses

10.1.1.65/32

10.1.1.97/27

10.1.1.72/32

10.1.1.69/32

10.1.2.2/30

and have created 2 summary addresses of

10.1.1.0 /24 and 10.1.2.0/24 so that i can redistribute them into an igrp process that is addressed with a 24bit mask.

The summary routes appear when I use show ip ospf summary-address, they do not appear in ospf routing table and are not redistributed into igrp.

Is this because the routes that make up the summary have a longer mask that the summary and therefore not entered into the ospf routing table

1 REPLY
Anonymous
N/A

Re: ospf summary address and igrp redistribution

From the IOS 12.0 Network Protocols Command Reference, Part 1, OSPF section concering the

address-summary command:

"For OSPF, this command summarizes only routes from other routing protocols that are being

redistributed into OSPF."

Basically the summary-address command will not summarize OSPF routes. If possible, perhaps you can

create static routes to the 10.1.1.0/24 and 10.1.2.0/24 networks pointing to the null0 interface

and redistribute these static routes into IGRP. Note: if you have additional static routes configured,

you may need to use route maps to control what static routes get distributed into each routing

protocol.

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