Jon Bertrand wrote: > I have two applications (both on the same PC) that communicate using > UDP multicast and TCP. > > If I disconnect the network cable the TCP traffic is fine but the UDP > multicast traffic stops. > > It appears I get a Destination Unreachable on the UDP sending side.
This is one of the wildest guesses I've ever made, but could it possibly be that the sending applications are binded to different interfaces? TCP into one that knows itself to be "local", whereas the UDP would be on an interface considers itself to be something other than local. I believe that in such a situation the "non-local" interface would possibly get a signal from the layer below that the cable is disconnected (and thus would be unable to reach "anything"). I seem to recall something to the effect that UDP was not actually binded, so this would quite seriously kill this theory. Granted, I don't know UDP too well (never really needed it for anything) so I might be way of the tangent on this one :) -- Markku Uttula ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ synalist-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/synalist-public
