One on one video calls are fine, full conference is problematic at best. Lync 2010

We have 8 outlying stores connect to our home office through VPN tunnels. I can video call the stores one on one without an issue. Video is fine. Audio is fine. When I try to conference with managers from all the outlying stores, audio is hard to hear from most and some do not appear in video or are unable to see me in their video. I am planning to WireShark a call and see if I can determine if their is any extraneous traffic that would not bog a one on one session, but would hose a full conference. I have read that I may need to set up Edge servers. I have servers at those locations for DC, print and file servers. Get-CsService -ConferencingServer provides the following output from the Lync server:

PS C:\Users\xxxxxxxx> Get-CsService -ConferencingServer


Identity             : ConferencingServer:lync.xxxx.xxxxxxx.xxx
FileStore            : FileStore:lync.xxxx.xxxxxxx.xxx
WebServer            : WebServer:xxxx.xxxxxxx.xxx
EdgeServer           :
UserServer           : UserServer:xxxx.xxxxxxx.xxx
WacServer            :
ImSipPort            : 5062
DataPsomPort         : 8057
AudioVideoSipPort    : 5063
PhoneSipPort         :
AppSharingSipPort    : 5065
ImWebPort            : 444
DataWebPort          : 444
AudioVideoWebPort    : 444
PhoneWebPort         :
AppSharingWebPort    : 444
AudioPortStart       : 49152
AudioPortCount       : 8348
AppSharingPortStart  : 49152
AppSharingPortCount  : 16383
VideoPortStart       : 57501
VideoPortCount       : 8034
MeetingPsomPort      :
MeetingWebPort       :
Mcus                 : {IMConf, DataConf, AppSharingConf, AVConf}
DependentServiceList : {UserServer:xxx.xxxxxx.xxxxx}
ServiceId            : 1-ConfServices-1
SiteId               : Site:Midland
PoolFqdn             : lync.xxx.xxxxxx.xxx
Version              : 6
Role                 : ConferencingServer

Running Get-CsConferencingConfiguration on a PC with the Lync client installed does not recognize the cmdlet.

April 9th, 2015 5:25pm

I believe all your calls are routed over the VPN tunnel as of now. I don't think the tunnels would have enough bandwidth to handle a Audio/Video conference along with so many participants especially since the tunnel bandwidth might be used for your other applications too.

It will be best to install an Edge server and have all your Lync traffic routed via the internet.

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April 9th, 2015 7:24pm

Hi,

When users connect to the corporate network using a VPN client, Lync media traffic is sent through the VPN tunnel. This configuration can create additional latency and jitter because media traffic must pass through an additional layer of encryption and decryption.

The recommended way is deploy an Edge Server in DMZ Zone, and make a split tunnel. Then Lync client will connect to the Access Edge Server for all signaling connections when on the corporate VPN. In addition, media sessions will not be allowed to establish connectivity through the VPN tunnel. Media sessions will be routed through the A/V Edge Server public interface.

More details:

http://blogs.technet.com/b/nexthop/archive/2011/11/15/enabling-lync-media-to-bypass-a-vpn-tunnel.aspx

Best Regards,

Eason Huang

April 10th, 2015 3:41am

Dattatray and Eason,

I suspected that this may be the issue. A couple of the stores are in areas with limited network bandwidth. We have increased most of them to 10x10 fiber lines, but this is not available in all areas. Thank you for your response.

Brian Gilmore

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April 10th, 2015 8:06am

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