Hello,

 

I have some multicasting issues with the HP switch we are using. When one of
the 2 sunray server in the failover load-balanced group is sending a
multicast message, then the switch is dropping unicast packets to that host
for 10/20 seconds L Disabling IGMP solves the problem but it is not really
ideal.

 

When we are using wireshark or snoop on the solaris 10 05/08 (with SRS4)
sunray server, we can observe that Solaris is duplicating the sunray
multicast messages on the primary public interface!! Is this normal ? This
strange behavior could be triggering a bug on our HP switch.

 

This is not happening on the ce1 dedicated sunray interconnect which is
implemented as another vlan on the same switch.

 

bash-3.00# snoop -i ce0.snoop -p 82-83

 82   0.00000 xxxx -> 224.101.101.101 UDP D=7009 S=7009 LEN=333

 83   0.00053 xxxx -> 224.101.101.101 UDP D=7009 S=7009 LEN=333

 

In order to troubleshoot this, we have implemented a simple C program on
solaris which creates a socket with sends multicast messages on the above
sunray servers but we cannot replicate the problem. We can observe that the
C program generates single multicast messages whereas solaris duplicates the
sunray software multicast messages.

 

Any ideas ?

 

Thanks

 

Thierry.

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