isdn backup to a serial interface

[Phlatts]

Has anybody seen where the serial line drops and the ISDN picks up but when the serial line come backup the ISDN does not drop.
The main router is a 7500
The other router is a 2503
Help!!!!! [sig][/sig]

 

[Guest_imported]

Are you using backup interface or floating static routes.
In case you use backup interface you can specify the time before isdn breaks off and serial connection is backup.
In case floating static routes you can set costs so that the connection with the lower costs is up.

You can email me at ramichhatwal@hotmail.com

 

[jeter]

how is your router setup?
we have the serial interface setup like this

!
username jeter password 0 cisco
!
isdn switch-type basic-dms100

interface serial0.1 point-to-point
ip adderess 192.168.67.38 255.255.255.252
no ip directed-broadcast
backup delay 10 10
backup interface BRI0

interface BRI0
bandwidth 128
ip address 192.168.67.38 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer string 7775551
dialer string 7335552
dialer load-threshhold 1 either
dialer-group 1
isdn switch-type basic-dms100
isdn spid 7023845551100 3845551
isdn spid 7023845552100 3845552
no fair-queue
ppp authentifcation chap pap
ppp multilink
Jeter@LasVegas.com
J.Fisher CCNA

 

[workaholic24x7]

I've successfully done this using the DTR command in the cisco routers... We placed the ISDN line on each routers' serial interface 1. Upon failure of the 128k circuit or T-1, the Cisco router will switch traffic from serial interface 0 to serial interface 1 and automatically
establish an ISDN 128k connection. Additionally, upon restoral of the 128k circuit or T-1, the data traffic will revert back to serial interface 0 and drop the ISDN 128k connection. Basically, the router was initiating the DTR commands to the Adtran terminal adapter.