This object indicates what types of IP address category can
be configured on this device.
single(0) means that each interface on the device can be
assigned only one IP address.
primary(1) means that each interface on the device can be
assigned an IP address as the primary one.
secondary(2) means that each interface on the device can be
assigned an IP address as the secondary one.
Devices which has the single(0) bit set to 1, should have
the primary(1) and secondary(2) bits set to 0.
Likewise devices which have the primary(1) and/or
secondary(2) bits set to 1, should have the single(0)
set to 0.