Dial-Peer / Destination-Pattern Question...

ptlinva

I purchased a Cisco 3640 off of Ebay that had FXO and FXS ports. It also had the previous owner's configuration and was used in a government environment. I won't say whose router it was - as they left all that information in the configs - but really enjoy looking how they did things.

There were over 70+ dial-peers using pots and voip. Here's my question...

There were multiple dial-peers with the same destination pattern (see below as just one example). The only differences that I could see was the preference command.

In my studies, the 1st destination pattern that matched was the one that was used. I'm a bit confused as to when the others would be used...

When would this type of configuration be used?

Thanks!
Paul L.

---

dial-peer voice 14060 voip
preference 1
destination-pattern 406.
progress_ind setup enable 3
voice-class codec 10
voice-class h323 10
session target ipv4:10.10.230.41
dtmf-relay h245-alphanumeric
fax-relay ecm disable
fax rate 14400
fax nsf 000000
ip qos dscp cs3 signaling
no vad
!
dial-peer voice 24060 voip
preference 2
destination-pattern 406.
progress_ind setup enable 3
voice-class codec 10
voice-class h323 10
session target ipv4:10.10.230.40
dtmf-relay h245-alphanumeric
fax-relay ecm disable
fax rate 14400
fax nsf 000000
ip qos dscp cs3 signaling
no vad
!
dial-peer voice 34060 voip
preference 3
destination-pattern 406.
progress_ind setup enable 3
voice-class codec 10
voice-class h323 10
session target ipv4:10.10.130.41
dtmf-relay h245-alphanumeric
fax-relay ecm disable
fax rate 14400
fax nsf 000000
ip qos dscp cs3 signaling
no vad
!

pitviper

The session targets are all different so this was more than likely done for redundancy - possibly 3 different fax servers (or some other type of computer telephony integration).

It's always fun looking at someone else's config. A couple of my 2811s came with some pretty sensitive info "backed up" in plain text in flash (even though the running configs were wiped).

Chris_

1760 I bought off ebay belonged to a bank! had access lists, radius server details and passwords in clear in the config - most of the time the previous user has presumed they are handing this kit over to a reputable company who will wipe all data before disposal!