Microsoft KB Archive/285093

= Troubleshooting Multicast Connectivity Issues Where One or More Router Links Are Involved =

Article ID: 285093

Article Last Modified on 6/5/2007

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APPLIES TO


 * Microsoft Windows Media Services 4.1

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This article was previously published under Q285093



SYMPTOMS
When you attempt to connect to a multicast station with Windows Media Player, you may either get an error stating the player was unable to make a connection to the server, or the player may roll over to unicast (if available).



CAUSE
This usually occurs when one or more routers between the client and server are not multicast enabled, or when the Time To Live (TTL) setting in the multicast station is set too low.



RESOLUTION
Run a test by connecting to the multicast station from a computer on the same segment as the Windows Media server. If the player successfully picks up the multicast stream, check the station properties to make sure that the TTL value is set high enough to account for all of the network hops between the server and the clients. The default setting for TTL is 5. Also, check all routers involved to make sure that they are multicast enabled. For more information on this topic, see the following:

http://www.microsoft.com/technet/prodtechnol/windowsmedia/deploy/fwconfig.mspx



MORE INFORMATION
For more in-depth information on multicasting, see the following:

http://www.microsoft.com/ntserver/mediaserv/techdetails/overview/multiwp.asp

http://support.microsoft.com/support/kb/articles/q165/0/11.asp

Additional query words: netshow WMS multicast router

Keywords: kbpending kbprb KB285093

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