LOL codecs have no bearing on this. The answer is A. The pattern matters not. There is no response to the SIP OPTIONS being sent, meaning the trunk to the D/E is down. Wrong pattern or no, the status would not be busyout unless the D/E was responding to the keepalives. The CUBE/CME/VGR here considers it down. Also, no information is given about the requirement for SDP so the default codec of G729r8 is being used. The answer is A.
If you look at the output in the question under the KEEPALIVE field it shows "busyout" that means the receiving end is not UP and the call fails. It really has nothing to do with the dailpeer. it's just configured for SIP-keepalives. check out this blog post
https://www.uccollabing.com/configure-cisco-cube-sip-options-ping/
the answer is A
I found this document:
Troubleshoot Busyout Dial Peers on CUBE or IOS Voice Gateway
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-border-element/217860-troubleshooting-busyout-dial-peers-on-cu.html
In the bottom of the document you see 2 steps to fix the problem.
Step 2 stated:
Remove the 'sip options-keepalive' on the dial-peer.
dial-peer voice 1000 voip
no voice-class sip options-keepalive profile 1
I think answer A is the right one
After looking into it and what John Doe said. It is A.
Look this https://pbxbook.com/cisco/Dial_Peer_Config.pdf
Variable-Length Matching will cause it to match the 2.
This means it is hitting the correct dial peer, but is failing because the peer is busyout.
The pattern 2. does match 2000 since it isn't terminated with a $. It's matching on "20" alone. g729 would be used as the codec since it isn't defined, but we aren't getting that far as the dial peer is in busyout due to failing keepalives. Can't negotiate or fail on codec if the dial peer isn't even able to communicate. D should be the correct answer here.
Yes it is. 2000 will match pattern "2." because it isn't terminated. Here it is on my CUBE:
dial-peer voice 555 voip
destination-pattern 2.
session protocol sipv2
session server-group 1
sh dialplan number 2000
tag = 555, destination-pattern = `2.'
VoIP dial peers default to G.729 if no codec is specified, so D is NOT correct.
Correct answer is B. Destination pattern is incorrect, as noted below by mmollura.
Destination pattern is incorrect. Should be 2... as one '.' is only 1 digit.
upvoted 2 times
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