Topic Last Modified: 2011-04-11

Each communication type that you enable for Quality of Service (QoS) must use a nonoverlapping port range for its traffic. Nonoverlapping port ranges are set by default when you install Microsoft Lync Server 2010. You can change these ranges if you need to, but we do not recommend it.

The default port ranges for Lync Server 2010 are as shown in the following table. You can actually use any port from 1024 to 65535. As noted earlier, DSCP marking is disabled by default. If you are using QoS for application sharing, you will need to adjust the port ranges so that none of them overlap with the others.

Communication type	Port range
Audio	49152 to 57500
Video	57501 to 65535
Application sharing	49152 to 65535

Audio and video traffic on clients require a minimum of 40 ports, 20 for audio and 20 for video. By default, all communication types on the client use the entire port range from 1024 to 65535, so you will need to change these port ranges in order to enable QoS. Management is easier if the port range on the client is within the port range for the same communication type, but the only requirement is that each server and each client have a nonoverlapping port range.

You can use the following worksheet to ensure that you have all the information that you need to enable QoS.

Component	Communication type	Executable name	DSCP value	Priority
A/V Conferencing service	Audio	AVMCUSvc.exe
	Video	AVMCUSvc.exe
A/V Edge service	Audio	MediaRelaySvc.exe
	Video	MediaRelaySvc.exe
	Application sharing	MediaRelaySvc.exe
	Peer-to-peer file transfer	MediaRelaySvc.exe
Application Sharing service	Application sharing	ASMCUSvc.exe
Mediation Server	Audio	MediationServerSvc.exe
Response Group application	Audio	OcsAppServerHost.exe
Conference Announcement service	Audio	OcsAppServerHost.exe
UCMA applications	Audio	OcsAppServerHost.exe
Lync 2010	Audio	Communicator.exe
	Video	Communicator.exe
	Application sharing	Communicator.exe
	Peer-to-peer file transfer	Communicator.exe
Lync 2010 Attendant	Audio	Communicator.exe
Lync 2010 Phone Edition	Audio	Communicator.exe

See Also