From: Mike Schlenger (mschlenger@xxxxxxxxxxxxxxxx)
Date: Fri Aug 17 2001 - 20:54:56 GMT-3
I would try using the summary-address command on the router (r1) that you
configured the loopbacks on. Its ok if R2 sees a /24 for those networks
because he has to advertise it to r3 anyway. My rule of thumb is to never
try and summaize networks that do not originate on that router. For example
if I had 10.1.x.0/24 networks on this router with network 172.16.x.0/24
networks being advertised to me, i would never try and summaraize the 172
network because the routes didn't originate on that router. Give it a whirl
and see what happens. I don't have time to set it up myself or i'd give it a
go.
Mike
7079
-----Original Message-----
From: Jim Brown
To: 'ccielab@groupstudy.com'
Sent: 8/17/01 4:52 PM
Subject: A cry for redistribution help! VLSM /28 into FLSM /24 (summary-ad
dress)
On my quest for redistribution knowledge, this has escaped me.
I have searched high and low, through the archives, in Usenet, and on
the
Cisco web site to no avail.
This discussion has gone on forever and I cannot replicate it with any
consistency.
How do you use the summary-address command at the redistribution point
to
summarize longer masks into shorter masks?
Everyone tells me it works, but not for me. Am I missing something? Are
there gothcas escaping me?
I'm throwing in the towel and begging for help. I pray the
redistribution
Gods will smile on me and offer enlightenment.
Scenario in question:
Area0--R1--Area1--R2--IGRP--R3
I have a couple of LoopBack interfaces in Area 0 with a /30. I
attempting to
summarize them in to a /24 for successful redistribution into IGRP. I
apply
the summary-address command on R2, but they won't appear in the R2 IGRP
update, or on R3 if you could imagine that.
I know the summary-address command is documented for summarization INTO
OSPF
on an ASBR, but there is so much talk about using it in the reverse that
I
feel left out of the party.
I know I can use an area range command on an ABR for summarization
upstream.
I know I can inject a default route into the FLSM to provide
reachability.
All this I know, but what I want to use is the summary-address command.
HELP!
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