The initdead parameter is used to set the time that it takes to declare a cluster node dead when Heartbeat is first started. This parameter generally needs to be set to a higher value, because experience suggests that it sometimes takes operating systems many seconds for their communication systems before they operate correctly. initdead is specified according to the HeartbeatTimeSyntax. A sample initdead value is shown below:
In some switched network environments, switches engage in a spanning tree algorithm whenever a NIC connects to a port. This can take a long time to complete, and it is only necessary if the NIC being connected is another switch. If this is the case, you may be able to configure certain NICs as not being switches and shrink the connection delay significantly. If not, you'll need to raise initdead to make this problem go away.
If this is set too low, you'll see one node declare the other as dead, and for non-CRM clusters, you'll see "both nodes own XXX resources" in the logs if initdead is set too low.