From: Mark Stover (mstover@xxxxxxxxx)
Date: Mon Feb 05 2001 - 00:19:12 GMT-3
Not sure if you've got a weird version of IOS or a misconfiguration, but you sh
ould be able to get dialer watch and OSPF demand-circuits working at the same t
ime. You may get a connection when the watched route first goes down, but then
it should drop again unless there is some other interesting traffic.
Mark
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Kevin Baumgartner
> Sent: Sunday, February 04, 2001 9:30 PM
> To: bhescock@cisco.com
> Cc: ccielab@groupstudy.com
> Subject: Re: watch-group observation
>
>
> Sort of the same thing that I found when doing OSPF with dialer
> watch-group. After the dialer idle timeout expired the ISDN line
> would drop and then get redialed by dialer watch.
>
> I guess the idle-timeout could be set higher, but the dialer watch
> feature doesn't seem to trigger a drop of the isdn line even if the
> watch route comes back. So could incure a high isdn line cost until
> it finally times out.
>
> Kevin
>
> >
> > This looks like normal behavior but, in my opinion, is broken:
> >
> > - dialer watch-group configured for network 30.1.1.0, which
> is learned via
> > ethernet 0
> > - shut down ethernet 0 interface, lose route for 30.1.1.0
> and isdn comes
> > up due to no route for 30.1.1.0
> > - eigrp forms neighbors over isdn and we get route for 30.1.1.0
> > - isdn drops after 120 seconds, the default idle-timeout
> > - isdn redials immediately since it has no route for 30.1.1.0
> >
> > Personally, I think IOS should be smart enough to know it
> only knows the
> > route through isdn so it should keep the line up if it
> doesn't know of a
> > route for 30.1.1.0 via some other interface. It's a waste
> of money to
> > increase the idle-timeout so this doesn't happen as often
> because then
> > isdn will always stay up longer.
> >
> > Anyone know of a way around this problem other than increasing the
> > idle-timeout? Looks like I may need to file a sys-wish bug
> to get IOS
> > changed so it doesn't drop the isdn link if the route is
> only known via
> > isdn. Perhaps it's just me but I think is silly that we
> drop the link,
> > only to bring it up again.
> >
> > Brian
> >
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