The postoffline script does the following on IP failover:
Calls /opt/VRTS/bin/fsclustadm frlpause_disable
to reduce the internal usage counter.
Each call to /opt/VRTS/bin/fsclustadm frlpause_enable
needs to be matched with a call to /opt/VRTS/bin/fsclustadm frlpause_disable
as the kernel keeps an internal counter to track the number of IP addresses active on a system. If there are no active IPs on a system, it will be in disabled mode.