From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Sun Oct 28 2001 - 17:35:45 GMT-3
Been pulling yet another all-day / night study session and was going
through the archive and came across a great solution by Steve Feldberg
from his posting on 9/24/01, regarding "question on redistribution
between vlsm and non vlsm". This is a way to get around not being able
to use summary-address in 12.1 with ospf if the network in question is
already in ospf and you can't do redistribute connected (and can't use
default network nor don't want to do local policy on the igrp router to
send all packets out to the next hop).
His solution is to add secondary ip addresses on an interface with the
same mask as what is used in igrp. For example, if you have
192.168.1.96 /27 on the router with igrp and 192.168.1.0 /26 on the ospf
router, it's not going to work. But if you add secondary ip address on
the ospf router with "192.168.1.0 255.255.255.224 secondary" and
"192.168.1.33 255.255.255.224 secondary", it works, the 1.0 /27 and 1.32
networks are advertised into igrp.
I verified it on some routers, works great.
Brian
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