From: David Ankers (d.ankers@xxxxxxxxx)
Date: Mon Feb 05 2001 - 03:34:25 GMT-3
Chris, Group,
I thought I'd check on the CCO about this problem and I came across the
following:
"To configure OSPF for on-demand circuits, enter the following command within
the OSPF configuration mode: ip ospf demand-circuit
This command is also shown in the following example:
OSPF_Router(config)#router ospf 200
OSPF_Router(config-router)#ip ospf demand circuit
Note If the router is part of a point-to-point topology, then only one end of
the demand circuit must be configured with this command. However, all routers
must have this feature loaded within the area and must be configured with the
ip ospf demand-circuit command. If the router is part of a
point-to-multipoint topology, only the multipoint end must be configured with
this command."
I thought demand-circuit was only configured on the interface? And how does
demand-circuits over multi-point interfaces work?
D.
On Monday 05 February 2001 05:13, you wrote:
> I think I found it, although I'm not satisfied ... running "ip ospf
> demand-circuit" should keep OSPF multicasts from going out the BRI
> interface, but they kept popping up ... I remember from somewhere that I
> had to define an dialer-list that denied OSPF, as I had earlier mentioned
> ... that fixed it, but that does not bode well for my understanding of the
> demand-circuit command .. any ideas? btw thx to all who've responded.
>
> -----Original Message-----
> From: Greg Ferro [mailto:gferro@netstarnetworks.com]
> Sent: Sunday, February 04, 2001 4:37 PM
> To: Chris Mott
> Subject: Re: OSPF/IGRP redistribution and DDR dial backup
>
>
> Do a "debug ip ospf lsa-generation" and watch what happens. I think you
> should see something interesting.
>
> At 03:51 PM 4/02/2001 -0600, you wrote:
> >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
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:28:36 GMT-3