The BRI does actually have a different ip scheme because it is dialing a
totally different isp that the t1 service goes through. But I will try the
static routes. Thanks for the info.
-----Original Message-----
From: Christopher Larson [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 05, 2001 2:25 PM
To: 'Elijah Savage'; Cisco (E-mail)
Subject: RE: ISDN Dialup Backup
Address your BRI seperatly, add static routes to the networks through the
BRI, and then ping. Once you know you have connectivity and they are
dialing, you should be able to change the addressing and add the backup
interface command.
You can also setup your ISDN as if you are going to make it a production
backup interface, but instead of actually adding the backup interface
command on the dedicated line, add a route with a higher admin distance
through the BRI, then do a shut on the dedicated line. Traffic should almost
immediatly take the BRI if everything is setup right.
I know the second option does not sound any different then what you are
doing, but it is my experience that simply doing a shutdown will not kick in
a dedicated backup interface. You actually have to unplug the line. An ISND
backup used in conjunction with the backup interface command will not
respond to an administrative shutdown.
-----Original Message-----
From: Elijah Savage [mailto:[EMAIL PROTECTED]]
Sent: Sunday, February 04, 2001 8:54 PM
To: Cisco (E-mail)
Subject: ISDN Dialup Backup
I support allot of customers with dedicated t1's and using isdn dialup
backup. I have had some customers that want to test the dialup backup
without taking the serial link down. I have noticed that on version 12.0 of
the IOS you can take the dial backup command off the interface and ping the
other side of the isdn link and make it come up and dial, this is great for
not having a customer experience any down time. Well I was working on a 1720
on Friday with IOS 12.1 and this does not work. You actually have to take
the serial link down to make the isdn dial. This is very inconvenient when
you are setting up a new customer and you do not know if the isdn line is in
place. Especially when setting up customers in Texas it seems like it takes
an act of god to have someone at the phone company give you the right spids.
I guess my question is this, does anyone know if this was a feature Cisco
had in IOS 12.0 and removed it from later versions or if this was a bug in
the 12.0 IOS. I have another engineer at work that swares it is a bug to be
able to take the dial backup command off and make the link dial up.
Any ideas?
Or any other ways I am overlooking in making the backup link come up without
having to take a customer down?
Elijah
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