From: Chris Mott (cmott@xxxxxxxx)
Date: Sun Feb 04 2001 - 18:51:51 GMT-3
I have a scenario whereby R1 runs OSPF to S0.1 (multipoint, Area 0) and S0.2
(p-t-p, Area 33), and IGRP to S1 (FRSW). It also has a dial backup (using
Dialer Profiles) via ISDN to R2 (which is also connected via it's own S0.1
to R1 via FR, Area 0). OSPF is tuned and running well, and IGRP/OSPF
redistribution is also functional - pings fly all around. ISDN is fully
functional. I would give some ASCII art here, but I have never done so and
would probably screw it up.
Addressing:
R1 - S0.1 - 172.16.1.1/24
S0.2 - 172.16.65.1/24
S1 - 182.16.1.1/24
D0 - 172.16.10.2/24
R2 - S0.1 - 172.16.1.2/24
D0 - 172.16.10.1/24
FRSW - S0 - 182.16.1.2/24
I want to implement dial backup of the S0.1 interface. I am using the "ip
ospf demand-circuit" command, but the issue is the redistribution of IGRP.
I have passive-interface under IGRP for S0.1, S0.2, D0, and B0 (this just to
be sure - prob not needed here). I also have a redistribution filter via
route-map under OSPF for the IGRP redistribution denying a few IGRP routes
(which works fine). The Dialer-list has an extended access-list denying
"ospf any any" and "ip any host 255.255.255.255" (broadcasts) with "permit
ip any any" at the end. I thought I had covered all the bases.
The jackpot issue is that the circuit keeps coming up and staying up, and
debug dialer gives me no useful information. It DOES however tell me that
broadcasts from 182.16.0.0 (the R1-FRSW circuit running IGRP) is
uninteresting, as well as OSPF multicasts via 224.0.0.5. I cannot tell what
is bringing up the circuit, but I feel that it is a redistribution issue.
I have scanned my e-mails, which contain a copy of the entire CCIE lab
archives for the last three months (big file on my HD, but faster to access
than the web site archives!), but there is nothing that points to a
solution.
My 1st (<- caveat here!) lab is in 10 days (Halifax, 14 Feb). I am close to
grasping the subtleties that will make or break my chances, and I thought I
had this issue cold, but alas ... can y'all (I'm from Nashville, remember)
think of anything I can do or check, or some fundamental I've missed?
I've enjoyed reading the various posts, and I learn something every day from
all of you. Mainly I'm learning that I do not know what I thought I did,
but that's the idea. Congrats to all new #'s, and I hope to join your ranks
soon.
TIA
Chris Mott
CCDP, CCNP+Voice
Solarcom,LLC www.solarcom.net
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