Cisco IOS Cookbook, 2nd Edition

View Dial Backup Status

Problem

You want to check on the dialer status of a router.

Solution

Here are some useful commands for looking at the status of a dial backup link. For dial backup that uses the floating static or dialer watch type configurations, you can use the show dialer command:

Router1#show dialer

For dial configurations that use the backup interface configuration, you can use the show backup command:

Router1#show backup

And, for backup configurations that use ISDN, you can get some additional information from the show isdn status, show isdn active, and show isdn history commands:

Router1#show isdn status
Router1#show isdn active
Router1#show isdn history

Discussion

The show dialer command provides a lot of useful information about existing dial sessions, as well as some historical statistics:

Router1#show dialer BRI0 - dialer type = ISDN Dial String Successes Failures Last DNIS Last status 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. BRI0:1 - dialer type = ISDN Idle timer (300 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason: ip (s=10.1.99.55, d=224.0.0.10) Interface bound to profile Dialer1 Current call connected 00:03:18 Connected to 95551212 (dialhost) BRI0:2 - dialer type = ISDN Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is idle Dialer1 - dialer type = DIALER PROFILE Load threshold for dialing ...