I have a two servers on the same subnet. I have an application installed which uses Multicast UDP to propagate events between the servers and keep them in sync.

This does not seem to be happening, so I want to make sure the Multicast UDP messages are getting through as my first step.

The servers are running Windows 2008 R2.

How can I test Multicast UDP connectivity between two servers?

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2 Answers

up vote 4 down vote accepted

Try iperf

An article that explains the different steps: http://taosecurity.blogspot.com/2006/09/generating-multicast-traffic.html

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Perfect, thanks! A Windows binary is linked from this article: linhost.info/2010/02/iperf-on-windows – Greg B Jul 26 '11 at 14:13
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iperf is a great tool, but could be a long procedure in installing it; Most repositories don't have this package. Depending on your Distribution, netcat is available in mostly every repository

You can also use netcat :

Server: nc -lu -p PortNr

Client: nc -vzu ServerIP PortNr

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