Hi !
We have a cluster of 8 nodes that are splited among 2 gigabit 24 ports
network switch. Port one on each server is used for services, and port 2 for
the "totem-ring" or cluster communications.
The servers are splited 4 on each switch, with each port configured to the
proper vlan. We have a vlan trunk between the switchs.
I need to reboot one or both switch, without interupting the cluster
services. In the past (i.e. before there were critical services), I did
rebooted a switch and the cluster lost quorum and all services stoped and
restarted as the quorum got back. I can live with a minute or so without
services as the switch reboot, but not 5 or 10 while the services stops and
starts.
Now, to reboot the switch, I plan on adding a 3rd temporary switch just for
the cluster vlan, and connect, one by one, the network interfaces to that
switch.
So, if I disconnect a the cluster network interface on a node, will that
node immediatly be fenced or I have some time, let's say 10 seconds, to
complete the reconnect ?
I also see that each node has a tcp connection to the other nodes. So, will
the disconnect / reconnect sever complety that connection or will it be
retried ?
Thanks for any insights.
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