|The Node_ID is assigned within the scope of the Global_ID.
The value 0(or 0.0.0.0 in dotted decimal notation) is
reserved and MUST NOT be used.
When IPv4 addresses are in use, the value of this object
can be derived from the LSR's /32 IPv4 loop back address.
When IPv6 addresses are in use, the value of this object
can be a 32-bit value unique within the scope of
Note that, when IP reach ability is not needed, the 32-bit
Node_ID is not required to have any association
with the IPv4 address space.