Backup dialing number...

[kwok-foong.wong]

Hi,

is it possible to configure the router to dial to another isdn number should the first backup isdn line failed? E.g if the first attempt to dial 12345 failed, it will dial another isdn number 98765.

[makchitale]

Yes, the router by default will callout the number in the sequence in which they are configured. Further we can configure the order (as seen below)

Router(config)#int dialer 1 (or even directly under the physical interface / if it’s a BRI/PRI then will not need dialer in-band))

Router(config-if)#dialer in-band

Router(config-if)#dialer string 12345

Router(config-if)#dialer string 67890

Router(config-if)#dialer string 13579

Router(config-if)#dialer order ?

last-successful <= Choose the last successful dial string first

round-robin <= Choose dial strings in round-robin order

sequential <= Choose dial strings in sequential order

For other configs on backup, please refer to:

http://www.cisco.com/pcgi-bin/Support/browse/psp_view.pl?p=Technologies:DDR&s=Implementation_and_Configuration

Thanks, Mak