Hi,
On Wed, 2006-06-28 at 09:40 +0100, Aidan Delaney wrote:
> Hey all,
> I've been experiencing some strange network issues with OpenSG on a
> client with multiple NICs. The network setup looks as follows
> eth0 (192.168.0.1) - the private cluster network
> eth2 (foo.bar.baz.blah) - the Internet facing NIC
>
> running
> [EMAIL PROTECTED]:~/OpenSG/Tutorials$ strace ./13ClusterClient -m mercury -i
> 192.168.0.1 2>&1 | grep sockopt
> setsockopt(9, SOL_SOCKET, SO_LINGER, {onoff=1, linger=1}, 8) = 0
> setsockopt(9, SOL_SOCKET, SO_REUSEADDR, [-7319998661918719], 4) = 0
> setsockopt(10, SOL_SOCKET, SO_BROADCAST, [33277200450977793], 4) = 0
> setsockopt(10, SOL_IP, IP_MULTICAST_TTL, "\2", 1) = 0
> setsockopt(10, SOL_SOCKET, SO_RCVBUF, [-7318349394214912], 4) = 0
> getsockopt(10, SOL_SOCKET, SO_RCVBUF, [-7318349394214914], [4]) = 0
> setsockopt(11, SOL_SOCKET, SO_BROADCAST, [34856855062708225], 4) = 0
> setsockopt(11, SOL_IP, IP_MULTICAST_TTL, "\2", 1) = 0
> setsockopt(11, SOL_IP, IP_MULTICAST_TTL, "\10", 1) = 0
for a running cluster I get a slightly different trace :
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
setsockopt(12, SOL_SOCKET, SO_LINGER, {onoff=1, linger=1}, 8) = 0
setsockopt(12, SOL_TCP, TCP_NODELAY, [1], 4) = 0
setsockopt(12, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
setsockopt(12, SOL_SOCKET, SO_SNDBUF, [1048576], 4) = 0
setsockopt(10, SOL_IP, IP_MULTICAST_IF, "\2\0\0\0\177\0\0\1\0\0\0\0\0\0
\0\0", 16) = 0
which looks like your client stops before calling the IP_MULTICAST_IF
setsockopt in question.
I currently have some trouble getting the multicast cluster running on
our rocks cluster (similar setup 2 nics and a different hostname per
nic on the head node). I thought I solved the problem but right now it
is back again.
I'll have a closer look tomorrow and let you once I solved it.
regards,
gerrit
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