Switch management server from OMW to OMU in case OMW failure

Problem -
I am having two management server architecture and out of which Operation Manager for Unix acts as Manager of Managers which receives alerts from OMW, NNM, BAC etc. and other management server is OMW which monitors servers and applications.

I want to forward all alerts to OMU from OMW in case OMW services goes down or OMW server is not available.

Solution -
To achieve above target, perform following actions -

(1) Create a failover policy in OMW.
Failover policy would of type Flexible Management Policy with following content -

#
# Configuration file
# defines two action-allow managers
# messages are always send to the primary manager
#
TIMETEMPLATES
#none
RESPMGRCONFIGS
RESPMGRCONFIG
DESCRIPTION "responsible mgrs for Nodes in VAA"
#Secondary managers have to be specified,
#but this section is not used by OpenView Operations for Windows
SECONDARYMANAGERS
SECONDARYMANAGER
NODE IP 0.0.0.0 ""
DESCRIPTION "HP OpenView Operation for Unix Management Server"
SECONDARYMANAGER
NODE IP 0.0.0.0 """
DESCRIPTION "HP OpenView Opearion for Windows Management Server"
ACTIONALLOWMANAGERS
ACTIONALLOWMANAGER
NODE IP 0.0.0.0 """
DESCRIPTION "HP OpenView Operation for Unix Management Server"
ACTIONALLOWMANAGER
NODE IP 0.0.0.0 """
DESCRIPTION "HP OpenView Opearion for Windows Management Server"
# Recommended: include the primary manager into the list of action-allow managers
# even if all possible managers are already listed
ACTIONALLOWMANAGER
NODE IP 0.0.0.0 "$OPC_PRIMARY_MGR"
DESCRIPTION "current primary manager"
MSGTARGETRULES
MSGTARGETRULE
DESCRIPTION "always send all messages to current primary manager"
MSGTARGETRULECONDS
MSGTARGETMANAGERS
MSGTARGETMANAGER
TIMETEMPLATE "$OPC_ALWAYS"
OPCMGR IP 0.0.0.0 "$OPC_PRIMARY_MGR"

(2) Deploy the policy on all of the managed nodes
(3) When you want to switch management server from OMW to OMU, run following command on OMU server :
opcragt -primmgr
Wait till the command execution completes and check whether command is executed succesfully. If it goes successful then management server switching is done.
(4) If you want to revert the management server back to OMW then issue the same command on OMW server :
opcragt -primmgr