Hi Sunny,
You can check F5-BIGIP-SYSTEM-MIB:
/usr/share/snmp/mibs/F5-BIGIP-SYSTEM-MIB.txt
sysAttrFailoverUnitMask OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This data indicates whether the machine is active or standby.
The value for this data could be 0, 1, 2, or 3.
The values of 1 and 2 are only defined for an active-active installation.
If two boxes are both active, value for unit 1 will be 1 and value for unit 2 will be 2.
Otherwise, for active unit, this value is 3; for stand-by unit, this value is 0."
::= { sysGlobalAttr 19 }
snmpwalk -c public localhost sysAttrFailoverIsRedundant
F5-BIGIP-SYSTEM-MIB::sysAttrFailoverIsRedundant.0 = INTEGER: true(1)
snmpwalk -c public localhost sysAttrFailoverUnitMask
F5-BIGIP-SYSTEM-MIB::sysAttrFailoverUnitMask.0 = INTEGER: 3
Aaron