ExpressCluster X 2.0 for Windows Reference Guide - Nec

Chapter 9 Details on network partition resolution resources
Understanding network partition resolution by PING
method
Settings of the PING network partition resolution resources
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To use PING network partition resolution resources, a device that is always active to receive and
respond to the ping command (hereafter described as ping device) is required.
When the heartbeat from another server is lost but the ping device is responding to the ping
command, the remote server is down. Failover starts. If there is no response to the ping command,
it is determined that the local server is isolated from the network due to “Split Brain Syndrome,”
and emergency shutdown takes place.
Normal operation
Ping device
All networks are
disconnected
Server down due to no
response from ping.
Shut
down
The server is shut down to prevent activation of
the same group in both servers.
For more information, refers to “Ping I/F tab” in Chapter 3, “Function for the Builder.”
ExpressCluster X 2.0 for Windows Reference Guide