[cisco-voip] VT Advantage issue

[Ryan Ratliff]

In that case take a packet capture of you starting up VTA on the working PC.  Since your broken one does see the phone via CDP just filter based on communication directly between the pc and the phone.  Look at the port getting used and see if you can connect to it using the broken PC.
If the connection is established from PC to phone: telnet from broken PC to phone on the port to confirm something is blocking your connection.
If the connection is established from phone to PC: use netstat on the pc to see if it is listening on the port.  If so, telnet from another PC to that PC on that port to see if it it is open.

At the end of the day if you are sure AnyConnect is doing the blocking you are going to need to work with somebody that can configure or uninstall it. 

-Ryan

On Feb 23, 2012, at 11:00 AM, Erick Wellnitz wrote:

The netstat command returns no results.

On Thu, Feb 23, 2012 at 9:08 AM, Ryan Ratliff <rratliff at cisco.com> wrote:
The phone may be refusing a connection because there's one already open.  What does 'netstat -an | findstr 4224' show?

-Ryan

On Feb 23, 2012, at 10:05 AM, Erick Wellnitz wrote:

I should be more clear.
 
VT Advantage works between this particular PC and phone but I cannot telnet on 4224.  I want to make sure I know what I'm looking for before I schedule time with this particular user again.

On Thu, Feb 23, 2012 at 8:41 AM, Ryan Ratliff <rratliff at cisco.com> wrote:
It's not a matter of a known working phone or not, it's your PC being able to connect to the phone it sees via CDP on that port.  That's required for the CAST connection and it sounds like something is blocking it.

-Ryan

On Feb 23, 2012, at 8:59 AM, Erick Wellnitz wrote:

I can't telnet to a known working phone on 4224.  The connection is refused.

On Wed, Feb 22, 2012 at 2:04 PM, Ryan Ratliff <rratliff at cisco.com> wrote:
Can you telnet from the PC to the phone's IP address on port 4224? 

If AnyConnect is blocking the outbound connection then it won't show up in a packet capture.   You can also get a problem report from VTA on the PC and look to see what errors it throws.

-Ryan

On Feb 22, 2012, at 2:27 PM, Erick Wellnitz wrote:

The access port of the phone shows that CVTA is the CDP neighbor with the address of the PC.

On Wed, Feb 22, 2012 at 12:00 PM, Erick Wellnitz <ewellnitzvoip at gmail.com> wrote:
Another strange one...
 
I have some users who have Video Advantage cameras and software.
 
One of them reports (and I have verified) that after receiving the Anyconnect client, the VT Advantage software can no longer recognize the phone is connected.  There is no attempt to by the VTA software to contact the phone or the phone to contact the VTA software according to the cature I did.
 
On a PC without the Anyconnect client if I disable video on the phone VTA still recognizes a phone exists and I see the appropriate traffic attemptign to establish the CAST connection.
 
I do not have authority to remove the Anyconnect client.
 
Anyone seen this behavior before?  As always, any ideas are appreciated.

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