To configure the WMS Unicast Data Writer plug-in

1. Click the server for which you want to configure the plug-in.
2. In the details pane, click the Properties tab, and then select the Show all plug-in categories check box.
3. In Category, click Unicast streaming.
4. In the Windows Media Services snap-in, in Plug-in, click WMS Unicast Data Writer, and then click Properties.

   -or-

   In Windows Media Services Administrator for the Web, click WMS Unicast Data Writer.

   WMS Unicast Data Writer Properties appears.

5. Do any of the following:

   To	Do this
   Allow unicast transmission of data using MMS and RTSP protocols through UDP	Select the UDP check box.
   Allow unicast transmission of data using RTSP and HTTP through TCP	Select the TCP check box.

   
   
6. Do one of the following:

   To	Do this
   To have the content stream determine the optimum packet size for streaming when using a UDP-based RTSP protocol (RTSPU)	Click Use default packet size from content.
   To specify the number of bytes that each streaming packet should contain when using a UDP-based RTSP protocol (RTSPU)	Click Use maximum packet size (in bytes), and then type a packet size value in the space provided. The default is 1452 bytes.

   
   
7. In the details pane, click Enable.

Notes

• Setting the RTP packet size to too small a value may prevent the Windows Media server from streaming.
• If the Windows Media server or any clients are behind a firewall or a proxy server that cannot pass UDP packets, you should disable UDP packet transmission for the WMS Unicast Data Writer plug-in. Clients that attempt to receive UDP transmissions through network components that are not UDP-enabled may experience latency during the protocol rollover process. For more information about protocol rollover, see How protocol rollover works.

Related topics

• Delivering content as a unicast stream
• How unicast works
• Work with plug-ins