Dirk et al,
Thanks for the response.
On 6/28/06, Dirk Reiners <[EMAIL PROTECTED]> wrote:
> ./13ClusterClient -m -i 192.168.0.1 mercury
>
> that should work better.
This makes no difference to me.
>From initial grokking of the strace on a failing run and an strace of
a succeeding one (after I kill eth2) It appears that the client sends
an intial Multicast connection (I realise it's UDP and not really a
connection) to the servers (as part of a handshake I presume). The
client then sends the data required for the rendering to actually
happen.
>From my data (which could be flawed) it appears that the MULTICAST_IF
is not respected for the initial connection It is respected for all
subsequent transmissions, however if the initial one does not succeed
...
I've solved the problem my end. I simply ifup and ifdown eth2 when I
need to. I suspect this issue to be a bug in OpenSG. In fact on
re-reading the thread my suspicions seem to be confirmed by Gerrit
Voss's strace
feynman: OpenSG/Tutorials% strace ./13ClusterClient -m -i 127.0.0.1
mercury |& grep setsockopt
setsockopt(9, SOL_SOCKET, SO_LINGER, {onoff=1, linger=1}, 8) = 0
setsockopt(9, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
setsockopt(10, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
setsockopt(10, SOL_IP, IP_MULTICAST_TTL, "\2", 1) = 0
setsockopt(10, SOL_SOCKET, SO_RCVBUF, [262144], 4) = 0
setsockopt(11, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
setsockopt(11, SOL_IP, IP_MULTICAST_TTL, "\2", 1) = 0
setsockopt(11, SOL_IP, IP_MULTICAST_TTL, "\10", 1) = 0
Notice that for this initial connection (as I'm calling it, please
correct my terminology) the IP_MULTICAST_IF is not set?
--
Aidan
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