Hi Ted,
        OpenSAF services uses MDS over TCP/TIPC to detect if any node has come 
up or gone down. You can check the node left messages in syslog. Can you please 
share the snaps syslog of all the nodes when one of them  has gone down.

Thanks
-Nagu

> -----Original Message-----
> From: Yao Cheng LIANG [mailto:[email protected]]
> Sent: 19 December 2014 09:47
> To: [email protected]
> Subject: [users] How does OpenSAF detests that one node has left the cluster
> 
> Dear all,
> 
> I have a question regarding how does OpenSAF detests that one node has left
> the cluster. I have two payloads, one servers as active, another standby. I 
> have
> captured packets on controller, strange enough that for a long time I could 
> not
> capture any packet from the active node, but standby node has not changed to
> active.
> 
> Thanks.
> 
> Ted
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