From: Richardson, Cheryl (cheryl.richardson@xxxxxxxx)
Date: Sun Dec 12 1999 - 13:34:19 GMT-3
Has anyone run into the following:
OSPF with VLSM subnets with mutual redistribution to IGRP. How do you get
the IGRP router to
recognize the VLSM subnets?
My thoughts were that there were two choices:
1) Either "area range" the VLSM nets so that they are /24 when they hit
IGRP.. or
2) Do the "ip default-network" thing
Since I had /28 subnets in area 0 (which is where the redist occurs) and did
not feel that area 0 routes could be
summarized and effect IGRP (I know that the summaries could apply to the
other areas), I chose "ip default-network".
Great, everyone can ping everyone. Then along comes BGP on the IGRP router
and I am asked to create
a supernet for all the routes to send to the EBGP router. Now, my route
table has a supernet and sends all pings
for the "unknown" VLSM subnets to the bit bucket (instead of taking my
default route). This would imply that
I made the wrong choice. But, how can you summarize within area 0?
summary-address applies to redistribution
from the outside protocol into OSPF. Is there another choice that I am
missing?
Thanks for any help!
Cheryl Richardson
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