From: ying chang (ying_c@xxxxxxxxxxx)
Date: Sat May 11 2002 - 17:21:15 GMT-3
Curtis,
I have to agree with Steve. When I did dialer-watch a week or two ago, I
could take dialer-group out and the dialer-watch would work without any
problems. What triggers dialer-watch to dial is a watched missing route, it
has nothing to do with the interesting traffic specified in the
dialer-group. After the line come up, it will check if the primary line come
backup every idle-timeout seconds, the line would stay up as long as the
route is missing.
Chang
>From: "Curtis Phillips" <cphillips@suscom.net>
>Reply-To: "Curtis Phillips" <cphillips@suscom.net>
>To: <steven.j.nelson@bt.com>, <ccielab@groupstudy.com>
>Subject: Re: Justification for use of Dialer-watch in OSPF
>Date: Sat, 11 May 2002 15:41:39 -0400
>
>Steve,
>
>I think you will find that demand-circuit is still required if dialer-watch
>is used with OSPF.
>Set it up and you will see that the OSPF will keep the ISDN up.
>
>Curtis
>----- Original Message -----
>From: <steven.j.nelson@bt.com>
>To: <cphillips@suscom.net>; <ccielab@groupstudy.com>
>Sent: Saturday, May 11, 2002 11:53 AM
>Subject: RE: Justification for use of Dialer-watch in OSPF
>
>
> > Curtis
> >
> > Think you may have answered your own question here except for one small
> > point.
> >
> > Dialer Watch and OSPF Demand circuit are not and were never meant to
>work
>in
> > conjunction with each other, they are two separate technologies that
>allow
> > demand (Dialer, X.25, atm and frame svc etc etc) circuits to keep quiet
> > unless a specific condition is met.
> >
> > In the case of ospf demand circuit the trigger is a change in topology
>etc
> > etc
> >
> > In the case of Dialer Watch when a watched route dissapears from the
>routing
> > table
> >
> > Don't confuse the two and use them as they are meant separately...
> >
> > HTH, ant more questions mail me off line...
> >
> > All the best
> >
> > Steve
> >
> > -----Original Message-----
> > From: Curtis Phillips [mailto:cphillips@suscom.net]
> > Sent: 11 May 2002 16:29
> > To: ccielab
> > Subject: Justification for use of Dialer-watch in OSPF
> >
> >
> > Hello All,
> >
> > I was thinking about the use of Dialer-watch with OSPF over ISDN. I know
> > that
> > demand-circuits are used in conjunction with dialer-watch in the same
>manner
> > as protocol packets are filtered by dialer-lists fro EIGRP or IGRP.
> >
> > Demand interfaces allow the dialer to bypass keep-alives and to dial
>only
> > when there is a change (addition or deletion) of LSA in the OSPF
>database.
> >
> > It seems to me that demand circuits would adequately cover the
>suppression
> > of
> > dial related to anything other than a change in database LSAs. So, I
>wonder
> > what the perceived benefit is of using dialer-watch with OSPF. Unless it
>is
> > to
> > track routes that are not in the OSPF process.
> >
> > Any thoughts?
> >
> > Thanks,
> >
> > Curtis
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