OSI/TS Configuration and Management Manual

Background Information About Addressing
OSI/TS Configuration and Management Manual—424831-001
2-16
Suggestions for Network Addressing Administrators
The encoding process for this example NSAP actually follows the binary encoding rule
for ISO 646 character DSP syntax. Notice that each pair of hexadecimal digits does not
resemble its ISO 646 character code (in other words, the digits “21” do not resemble the
character code for “A”).
Suggestions for Network Addressing Administrators
A network addressing administrator is the person who implements the rules specified by
the network addressing authority. This subsection provides some practical suggestions
for OSI network addressing administrators.
OSI Test Networks
If your OSI network is experimental (used for testing, for example), the values of the
NSAP addresses are most likely irrelevant and can be constructed according to your own
rules. The OSI/TS subsystem requires only that the maximum length be 40 hexadecimal
digits.
Practically speaking, any hexadecimal number can be used as an NSAP address. You
could also use any character string and convert the characters, for example, into ASCII.
Small or Initial OSI Networks
If you are implementing an OSI network that may be connected to other OSI networks
in the future, you should probably establish a local format for the DSP if any of the
following conditions apply:
•
AFI and IDI values are already defined for your domain.
•
Your domain is not yet subject to the rules of a parent network addressing authority.
•
You are the network addressing authority for your domain.
Large or Established OSI Networks
If you are responsible for a large OSI network that is already established or is being
implemented within a larger organizational structure, you should consult with your
parent network addressing authority to determine the rules for NSAP address allocation
and administration. For example, OSI networks within U.S. government agencies must
adhere to the U.S. GOSIP rules, or OSI networks within large private institutions must
use a predetermined IDI value.
OSI/TS Subdevices
OSI/TS subdevices enable applications to access the transport services provided by
OSI/TS. They are added or created using SCF or SPI commands (at which time you can
also specify all subdevice attributes). They can also be configured using SCF or using
the SETPARAM procedure; however, the SETPARAM procedure does not support all
the subdevice attributes. SCF and the SETPARAM procedure can also be used to
retrieve information about subdevices.