VOIP firewall!!

Root Cause!!

We engineer would like to think everything happened for a reason, right? But sometimes we see some unusual phone behavior  I can't find any explanation for my customer.

*one extension was used as a shared line but was only ringing on one phone only!!!

Phone reset resolve that issue.Reason: was registered to the different subscriber.
??

*Sometimes No dial tone.Normally phone reset to resolve this issue.But Cisco was kind enough to give us an engineer special firmware version for the phone.
>Not sure that resolve the issue.But still having the same phone stuck with an older version.
?Why now? same firmware we have been using for last six month everything was working fine.


* Couple of TAC Case was open phone going to VM and user can't dial out.On-call manager everything was fine.

Subscriber not backing up!!

 We have a total of 12 subscribers, including one publisher and two tftp servers. One of our subscriber that was added to cluster recently was not backing up on publisher, we are getting used is not backed up for more than 10+ days.


I dig some website and found this might be the case...
FYI: for us it was not the real issue. We had something to do network I still need figure out what was exactly caused this issue from the Networking firewall team!! Until then please wait...

Try restarting DRF Local/Master services.It should fix that issue but not 100% guaranteed (reference from some other Cisco support forum also it was a none bug on 8.6). If that still doesn’t resolve the issue,we will have  go to the Pub/Sub's OS Admin page to re-generate the IPSec certificate, and then restart the DRS service in Pub/PSAC2.

https://supportforums.cisco.com/discussion/11605411/cucm-drs-backup-fails-one-subscribers

https://supportforums.cisco.com/discussion/11806556/cucm-back-issue-unable-contact-server-master-or-local-agent-could-be-down