intriguing conectivity issue

[Guilherme Mascarenhas]

Hi all,

I have an intriguing (at least for me) scenario.
It's CUCM 7.
There is site over the WAN using SRST. Between the CUCM and the site there also a firewall.
I asked the firewall (Juniper) technician to open the ports referred on the document "CISCO UNIFIED COMMUNICATIONS MANAGER 7.0 TCP AND UDP PORT USAGE”  on session “Signaling, Media, and Other Communication Between Phones and Cisco Unified Communications Manager “.

The phones are not registering on the CUCM for the exception of one Cisco 7962 (there are a lot in the same network unregistered) and all the 7937.
The configuration of the IP Phones it was to disable the user to see to information on settings button and the web access is also disable (it is not possible to change because all ip phones can’t reach CUCM).

In the CUCM and TFTP logsI can find only information regarding the registered phones, even a failed information is not found in the logs (tried to find IP and MACs).

Anybody have any idea on what’s going on?

Any help will be really appreciated.

Best Regards,

[Mohammed Al-Assadi]

For sure it is network or firewall problem,

To overcome setting disabled, I suggest factory reset for one of the unregistered phones, after factory reset you can see if the phone can download the images from CUCM and you can access the settings and check status messages,

Sent from Cisco Technical Support iPhone App

[acampbell · Accepted solution]

Hi,

I have encountered issues with Juniper firewalls too

There seems to be issues caused by the firewalls and Cisco skinny (SCCP) TCP port 2000.

Try :-

unset alg sccp enable

http://kb.juniper.net/InfoCenter/index?page=content&id=KB18226&actp=search&viewlocale=en_US&searchid=1318116714197

HTH

Alex

[Guilherme Mascarenhas]

Thanks a lot for all the answers.

It was exactly the reported bug.

after disable "alg sccp" on juniper firewall, all phones got registered.

Best Regards,