From: Ahmed Al-Ghawas (ghawas@xxxxxxxxxxxxxx)
Date: Mon Jul 29 2002 - 07:40:17 GMT-3
Paul,
Try using Dialer Watch alone by specifying the serial interface network in
the watch-list. This will enable the link to come up only if the serial link
goes down and will disconnect once the serial line comes back up.
You would also need to deny eigrp from being an interesting traffic
(dialer-list) . This is to avoid broadcast from initiating the ISDN line.
HTH
Ahmed
----- Original Message -----
From: "Casey, Paul (6822)" <Paul.Casey@o2.com>
To: <ccielab@groupstudy.com>
Sent: Monday, July 29, 2002 11:36 AM
Subject: Help please
> A question,
>
> I have a 2 routers, connected back to back with serial connection, and
> running eigrp and advertising local routes on both sides. No problems so
> far.
> I also have an ISDN line between the 2 routers, and the bandwidth and
delay
> on the link is to be set to the same as the serial interface, also EIGRP
is
> to be run on the interfaces.... Again no problems.. The route should show
up
> with 2 possiberl paths, in the routing table, ..... becuase of the same
> bandwidth and delay.
>
> Now here's where the problem starts,
> EIGRP is not to keep the ISDN up..
> Also when the serial link is active the router should prefer that link
over
> the ISDN link...remember bandwidth and delay are set to be the same.
>
> Now the problem here is that if I use passive interface on the isdn link
the
> routes are removed from the routing table, over the ISDN link and EIGRP
> doesn't see it as a possible path, and when you pull, out on side of the
> serial link, The router cant route to the other side because passive
> interfaces has stopped the hello's and the neighbor formation.
>
> But I dont see any other way of stopping eigrp from bring up the
link...???
>
> I have tried using backup interface, with dialer-watch and not using
> passive-interface bri0 and this works fine.. no problems.. however for
> reading the case seceniro, you are not supposed to put the isdn as a
backup
> interface as the router is supposed PERFER the serial link when both links
> are working.
>
> Also I could use an access-list with the dialer-list, and deny eigrp, but
> then no routing info would pass over the isdn link either, as far as I
know.
>
> I am confused as how you are expected to maintain the routes over isdn,
and
> at the same time stop eigrp from bringing up the link..
>
>
> Any help appreciated
> kind regards.
>
> Paul..
>
>
>
>
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