From: Silvio Nunes (silvio_98@hotmail.com)
Date: Tue May 27 2003 - 22:14:56 GMT-3
More informations about it:
" Dialer watch-list group-number delay route-check initial seconds : This
command enables the router to check whether the primary route is up after
the initial startup of the router is complete and the timer (in seconds)
expires. Without this command, dialer watch is only triggered when the
primary route is removed from the routing table. If the primary link fails
to come up during initial startup of the router, the route is never added to
the routing table and hence cannot be watched. Therefore, with this command,
dialer watch will dial the backup link in the event of a primary link
failure during the initial start up of the router."
>From: "Daniel Cisco Group Study" <danielcgs@imc.net.au>
>Reply-To: "Daniel Cisco Group Study" <danielcgs@imc.net.au>
>To: <ccielab@groupstudy.com>
>Subject: Dialer Watch Technology Flaw ????
>Date: Wed, 28 May 2003 07:54:00 +1000
>
>I came across a "feature" in Dialer watch today...
>
>R1(Spoke)---------R2(Hub)
>
>R1 uses ISDN as backup for its main link to the Hub site. Backup is
>configured using dialer-watch and it works very well.
>
>R1 watches a route, and brings up the ISDN when the route disappears. So
>far so good.
>
>However, if I reboot R1, and the main link to the hub fails at the same
>time, dialer watch never brings up the ISDN link once the router finishes
>its boot sequence. The reason for this (I guess) is that when the router
>reboots, it is watching a route which has never existed (as far as the
>router knows). Therefore dialer watch does not bother to bring up the
>backup link.
>
>Some of you may think that the chances of this scenario occurring is quite
>slim. However, it did happen to me this morning! It is also quite
>conceivable that someone may decide to "reboot" the router is an effort to
>restore the main link...... If they do this, then bye bye backup.....
>
>Has anyone come across this before? Is there a workaround? Can I turn this
>feature off? (but still use dailer watch).
>
>Daniel
>
>
>
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