The value of tBgpInstanceOperStatus indicates the operational status of
the BGP instance for the virtual router.
A value of 'inService(2)' means the bgp instance is fully functional.
A value of 'outOfService(3)' means the bgp instance is down.
A value of 'transition(4)' means the bgp instance is performing a
transition from state inService(2) to outOfService(3) or vice-versa.
A value of 'disabled(5)' means the BGP instance needs to be restarted
by the user.