The device's administrative IP address. The device may
automatically discover a value for this object using the
BootStrap protocol (BOOTP). The object value is also
duplicated in the MIB-II ipAddrTable.
This object is writable only if the value of
ipConfigMethod is set to manual(1).
A write to this object will take effect immediately,
replacing the previous address, if any. The default is
0.0.0.0, or no address.