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Isdn Bri config with multiple dialer strings


Dear all,

I have a branch router (1720 with 12.2 ip voice plus IOS)at a remote location.

This branch has a serial connection to the central office named A. Also has a backup connection to the central office A via backup isdn.

Here is the config

interface BRI0

description *** Backup link to Central A, peer ip ***

bandwidth 64

ip address

encapsulation ppp

load-interval 30

dialer idle-timeout 90

dialer string 11111

dialer hold-queue 10

dialer-group 5

isdn switch-type basic-net3

no peer neighbor-route

no cdp enable

ppp authentication chap callin

ppp chap hostname remote-branch

ppp chap password branch-password

Everything is working properly.

I tried to add a second dialer string (dialer string 222222) to the second central site named B , in order the remote branch to have an alternate connectivity to the services provided.

The config worked properly , when the central A router is down, the remote branch calls to the Central B router in order to have connectivity.

My question is:

Ios 12.2 version does not support the command dialer order in order to specify how the bri will try to connect.

This command is supported at 12.2T and later.

Does someone know how the dialer order is done without the specific ios command <dialer order> ?

Thanks in advance


1 Reply 1

paolo bevilacqua
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

Numbers are used in the order entered. If you want to change the order, remove all the numbers and enter them again.

Hope this helps, please rate post if it does!

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