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622

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1
+3  Q: 

Java Multicast Time To Live is always 0

I have a problem with setting the TTL on my Datagram packets. I am calling the setTTL(...) method on the packet before sending the packet to the multicastSocket but if I capture the packet with ethereal the TTL field is always set to 0

+1  A: 

Funny that you should ask this, because I just wrote about this yesterday, I was having the same problem about 6 months ago. Basically you have to set an special system property telling the JVM to use an IPv4 stack

-Djava.net.preferIPv4Stack=true

pfranza  2008-09-26 14:35:33
thanks I'll give that a try
 2008-09-26 14:36:16

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