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Lync client peer-to-peer communication issue

Answered Lync client peer-to-peer communication issue

  • Monday, June 06, 2011 11:56 AM
     
     
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    Good time to everyone!

    We trying to establish peer-to-peer audio/video call but the lync client can not do it. There is an error "Call failed due to network issues".

    All the ports between workstations with Lync client are closed. I use the Microsoft Lync Server 2010 Protocol Workloads Poster.

     It says that ports must not be opened between clients (except Application Sharing). We can not open ports between worksations due to security considerations. How can we enable peer-to-peer communications in our case?

     


     

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  • Tuesday, June 07, 2011 5:07 AM
     
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    As far as Peer to Peer to audio or video is concern, the first attempt by the Lync clients will be to do a Media sessions directly between the two clients, and the required ports should be open.

    If that fails (due to no routing or port restrictions, etc) the clients will try to use the Lync Edge internal interface to proxy the media sessions between the clients. In this case the clients should be able to connect t edge over UDP 3478 ot TCP 443.

    Cheers.

    Shahan

     

    • Marked As Answer by egoncharov Thursday, June 09, 2011 8:50 AM
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  • Thursday, June 09, 2011 7:53 AM
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    Hi,

    If two clients need to establish media session they should open the requried media ports for communication directly or connect to the internal Edge NIC over either UDP 3478 or TCP 443 if media ports closed.

    If you determined on blocking ports between your users,you should deploy edge server with high availability to handle the amount of Audio/Video sessions

    You may find more information from the following link

    http://www.shudnow.net/2010/12/06/lync-server-2010-port-ranges-and-audiomedia-negotiation/ 

    Another document about how to deploy Edge server for your reference.

    http://technet.microsoft.com/en-us/library/gg398918.aspx

    Regards,

    Sharon

    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    • Proposed As Answer by Lasse Wedø Thursday, June 09, 2011 8:09 AM
    • Marked As Answer by egoncharov Thursday, June 09, 2011 8:50 AM
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