Some 7941 phones can't find the corporate directory since upgrading to CUCM 220.127.116.1100-8. Phone load is SCCP41.9-0-3S. Forum is loaded with similar problems. I've tried some of the solutions suggested none of which have corrected the problem. It seems that the phones in question are being seen as 'secure' phones because they are picking up the Secure Phone URL's from Enterprise params. I can't see why this is happening all phones are set to use the Standard SCCP non-secure profile. The only difference I can find between 7941 that were working and ones that weren't is the URL pointers. I tried changing the secure Enterprise params to the same as the non secure Enterprise params. The phones picked up the new URL but still couldn't find the corporate directory (host not found). Guess I could try deleting the phone and recreating it but that would leave me not knowing what caused it if it's resolved by this action. Other than that I'm running short on ideas.
I've attached the latest phone log from one of the lost 7941. Seems it's not finding the proper .CTL file?
There is one more item to look at that can cause the "Host not found" as well as a loss of ring tones on version 8.6 and later. I am not sure which version this started in but I believe it is with 8.5 that the phones started using the configuration file for the URLs to look up services. It also used the locale file to confirm the certificates. If there is "ANYTHING" that is out of place with the certificates on the servers it can cause this process to fail and the error to occur. In my case during a rehost of my servers I was forced to reload the subscriber to get the cluster working and the database to sync. In the process the servers had created some self signed certificates. My servers originally had third party certs from our internal CA server. When I finally found this thread it got me looking at the phone logs and I could see the cert validation failures. Looking at the certificates there were several for tomcat-trust issued to the server name. The self signed cert was there along with the third party cert. To fix my system it was a matter of deleting the self signed certificates for the services that I had issued third party certificates for. After a reboot all was well (at least so far). The directory now works as well as the custom ring tones have returned.
Ya, by default i have use the IP Address instead of the DNS.
But the problem still same.