From: Kevin Baumgartner (kbaumgar@xxxxxxxxx)
Date: Mon Jan 29 2001 - 16:53:07 GMT-3
I have heard this a few times but I have had no problems using it with OSPF.
Maybe this was a limitation in earlier 12.0 images.
Kevin
At 01:18 PM 1/29/01 -0600, Wade Edwards wrote:
>As I recall dialer watches work only with IGRP and EIGRP. If you need OSPF
>then the demand circuit is the best way to go.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Jeremy Gray
>Sent: Sunday, January 28, 2001 2:34 PM
>To: ccielab@groupstudy.com
>Subject: RE: ISDN Backup without the backup interface command?
>
>
>
>A demand circuit is useful if you really msut run OSPF over an ISDN line.
>
>A better answer to this problem is to use a dialer watch-list, a very cool
>facility used to trigger DDR when a 'watched' route is absent in the routing
>table.
>
>This is great for a number of reasons.
>
>1) Packet switched networks are not the best at telling a DTE when there's a
>problem in the cloud. Examples being ATM and FR
>Interface may stay up/up even if the remote is down.
>
>2) You can place a DDR in a place further into your network rather than on
>the same router as a critical link and still have DDR work when the link
>fails if the routes being watches originate beyound the point of failure.
>
>Regards,
>
>Jeremy.
>
>PS: Joined today. Lab date March 8th.
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Robert DeVito
>Sent: 28 January 2001 16:39
>To: obuba@bellatlantic.net; mac38456@pegasus.cc.ucf.edu;
>ccielab@groupstudy.com
>Subject: Re: ISDN Backup without the backup interface command?
>
>
>
>
>Another thing to keep in mind is that ospf demand circuit will cause the
>isdn circuit to come up when there is a topology change.. So don't be
>shocked when it comes up every once and awhile.
>
>Robert
>
>----Original Message Follows----
>From: "Nnanna Obuba" <obuba@bellatlantic.net>
>Reply-To: "Nnanna Obuba" <obuba@bellatlantic.net>
>To: "Miguel A. Ciena" <mac38456@pegasus.cc.ucf.edu>,
><ccielab@groupstudy.com>
>Subject: Re: ISDN Backup without the backup interface command?
>Date: Sun, 28 Jan 2001 10:10:43 -0500
>
>That's no trick, use ospf demand circuit
>
>
>Nnanna Obuba, CCIE # 6586
>www.nantech.com
>Online lab for CCIE Preparation
>----- Original Message -----
>From: "Miguel A. Ciena" <mac38456@pegasus.cc.ucf.edu>
>To: <ccielab@groupstudy.com>
>Sent: Sunday, January 28, 2001 9:07 AM
>Subject: ISDN Backup without the backup interface command?
>
>
> > Between R3 and R5 I got a ISDN link. I want to configure my ISDN to =
> > back-up my frame relay connection between R3 and R5...Here is the Trick:
>=
> > Without using Floating Static and without using the Back-up interface =
> > command..My Frame and ISDN are in OSPF area 0...
> >
> > any ideas..
> >
> >
> >
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