camel-netty - unable to consume on UDP multicast addresses

When using a route to listen to UDP multicast address , no messages seem to get consumed. No exceptions are observed.

Multicast address is defined as addresses in the range of 224.0.0.0 through 239.255.255.255 (http://en.wikipedia.org/wiki/Multicast_address)

Input was simple string (e.g. "Test String")

Example Route:

<route>
<from uri="netty:udp://225.1.1.1:8001?allowDefaultCodec=false&sync=false&broadcast=true"/>
</route>

Found an old topic in the user discussion forum that seems related. Did not find any unit tests in the Camel source code exercising this behavior. (http://camel.465427.n5.nabble.com/camel-netty-and-multicast-tt4638622.html)