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Advisor
NOSaturn
Posts: 29
0
Accepted Solution

CMA DNS SRV Record

I'm trying to get auto discovery working for CMA, but I'm getting stuck in a "Unable to connect to the provisioning server" message. I run Wireshark and see the request from my computer to the DNS asking "Standard query SRV _cmaconfig._tcp", but the DNS responds with "no such name".

 

Attached is a screen cap of how my DNS admin configured the service. The text in the admin guide says I should have something like this: "__cmaconfig._tcp.wvus.org 86400 IN SRV 0 0 443 vtc.wvus.org". 

 

Any hints where i messed up? 

Polycom Employee & Moderator
SteffenBaierUK
Posts: 5,399

Re: CMA DNS SRV Record

[ Edited ]

Hello NoSatrun,

 

welcome to the Polycom community.

 

It looks like you are using two __ lines rather than just one _

 

Best Regards

 

Steffen Baier

Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

Above is necessary in order to track issue internally within Polycom.

Please ensure to always check the VoIP FAQ , PSTN FAQ or RPM FAQ

If you find my post helpful, and it answers your question, please mark it as an "Accepted Solution" and feel free to give me Kudos.
Advisor
NOSaturn
Posts: 29
0

Re: CMA DNS SRV Record

Thanks Steffen. I followed the CMA doc with a copy and paste :)

 

 

I removed the extra "_" but find the same thing. Attached is the wireshark of the two marked frames. It is starting to look to me like the DNS is checking an external name server for this. 

 

Am I right? if so, what do I tell my DNS admin? If not, ?

Polycom Employee
simons
Posts: 226
0

Re: CMA DNS SRV Record

You are right, the dns lookup is going to the root DNS servers:

 

_cmaconfig._tcp..!............@.a.root-servers.net..nstld.verisign-grs.com

 

Your domain name is missing from the service lookups. I would check to see if the PC is part of a domain or not. You can also look the TCP/IP properties of the network connection you are using. There is a DNS tab which has some options about adding a suffix (aka you domain name). I would try this first and repeat your tests.

 

S.

Advisor
NOSaturn
Posts: 29
0

Re: CMA DNS SRV Record

gaaaaaaaaa

 

yeah, my test bot was not on the domain. tried it from my box and it works. 

 

Thanks!

Member
salamiismail
Posts: 3
0

Re: CMA DNS SRV Record

Hi Steffen,

 

I am having this same issue. I have deployed two CMA4000 servers, and the CMA desktop clients cannot Auto Register with any of the CMA Servers. This is after creating a DNS Service Entry for them. The string we used is this:

 

__cmaconfig._tcp.nlng.net 86400 IN SRV 0 0 443 NLNGVCCMA001.nlng.net

 

where NLNGVCCMA001 is the server's DNS name.

 

Is there any issue with the string?

 

Kindly assist.

 

Best Regards

Ismail

 

 

Polycom Employee & Moderator
SteffenBaierUK
Posts: 5,399
0

Re: CMA DNS SRV Record

Hello Ismail,

See my original reply to the topic starter.

Two __ underscore instead of _ one.

Best regards

Steffen Baier
Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

Above is necessary in order to track issue internally within Polycom.

Please ensure to always check the VoIP FAQ , PSTN FAQ or RPM FAQ

If you find my post helpful, and it answers your question, please mark it as an "Accepted Solution" and feel free to give me Kudos.