CallManager dropping connection

[Neily]

The majority of our company use the Cisco IP Communicator software along with the Cisco Agent Desktop (CAD) running on WinXP Pro SP2.

We are having issues with people losing their connections regularly throughout the day to the CallManager's. In some instances this freezes their machines and they have to restart, not good for our business. We've tried implementing QoS, but this hasn't helped. Can someone please let me know what ports we require to setup with QoS?

We are also using the Windows Firewall. Which ports should be opened for this?

Machines have 256Mb RAM but are being upgraded to 512Mb very soon!!

THANKS TO ALL WHO REPLY!!

 

[mishkanyc]

only 256? thats definetly not enough your problem is probably windows
also the firewall wont help since it slows everything down (network traffic wise) at least 30 percent.
any reason to have the firewalls on pcs?
also are you usigng ipcc express?

 

[Neily]

We aren't using IPCC Express.

AS I said we are upgrading to 512Mb but machines that do have that also still have the problem. We even have ones with 1Gb doing it!!

I've considered maybe turning off Windows Firewall, but only as a last resort.

Some machines have been fine never having problems. So can it really be the firewall???

 

[mishkanyc]

quick questions
cisco agent desktops? what are they connecting to?
what version of ccm are you using? is it a cluster?
and what are your switches?
did you turn off the firewall at least on the couple of those machines? to see if it helped?

 

[Neily]

UPDATE!!!

I have moved some of the users that have been experiencing this problem to an OU which has the firewall disabled.

Currently this appears to be helping!!

THANKS FOR THAT SUGGESTION - Let you know more when I find out

 

[Neily]

As I've said previously, dsiabling the windows firewall has helped and seems to have stopped them from dropping the connection and hence loggin the agent off.

However, I've been asked to find out why this is happening and to enable any ports that are required and might be causing this problem rather than just disable it.

Can anyone give me a comprehensive list of ports that need enabling?

I've also noticed that these ports are dropping in the firewall logs: 1117; 1747; 1741; 1089

Can anybody tell me what these are?

THANKS

 

[inet10980]

Hello

You need to ensure that you have proper ports open through firewall for VoIP to work. There are some single port as well as range of port. Now if you dont open the proper range then it is possible that connection that are using port from out of range will be dropped

Below is a link from Cisco site that gives you list of all the port that needs to be open through Firewall.

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00801a62b9.shtml

Khan

 

[Neily]

Having tried this with every body having the Firewall disabled, we found it didn't improve things. We still get the occurance where the Agent logs out reporting that the sever is offline when the person next to them is working fine still.

 

[jneiberger]

Have you opened a TAC case?