From: Rob Webber (rwebber@xxxxxxxxxxxx)
Date: Tue Apr 03 2001 - 13:35:32 GMT-3
This would certainly work. Another way - which avoids static routes - is to
use dialer watch. This "watches" the routing table for a certain route and
can activate the ISDN when that route disappears. This is a newer feature
(11.3? 12.0?) but I have found it very reliable. It keeps the ISDN line
completely quiet when the primary path is up:
interface (bri0, dialer, etc.)
ip address 10.51.1.4 255.255.255.0
dialer watch-group 1
!
router eigrp 1
network 10.0.0.0
!
dialer watch-list 1 ip 10.10.10.0 255.255.255.0
Where 10.10.10.0 255.255.255.0 is a stable subnet on the far router -
ideally a loopback interface (but not the subnet you are backing up). Just
make sure the far router is advertising 10.10.10.0 255.255.255.0 via the
"normal" routing protocol (in this case EIGRP) via the primary path.
Rob.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Steven Weber
Sent: Tuesday, April 03, 2001 11:06 AM
To: David Fahed
Cc: ccielab@groupstudy.com
Subject: Re: Isdn backup
how about seting floating statics on both your secondary and ISDN routes.
Just make sure that the AD on the ISDN routes is highest.
HTH
Steve
----- Original Message -----
From: "David Fahed" <dfahed@ais.gp>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, April 03, 2001 10:28 AM
Subject: Isdn backup
> Hi,
>
> My problem is very simple :
> I want to backup a line between two router R1 and R2. I run ospf between
R1 and R2 and I have two path to go from R1 to R2.
> What I need is : if there is no path available between R1 and R2 I want to
bring up the isdn line and only in that case. I tried with route map and
routing table
> (no route available for R2 network on the R1 routing table) but without
success. Please send me all your tips for this.
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