Installing and Administering OSI Transport Services

Chapter 1 53
HP OTS/9000 Resources
Structure of NSAP Addresses
This format is commonly called the 2/6/1 structure because of the sizes of
the three defined fields.
This is the format that NSAP addresses should obey in order to get the
most use out of the automated routing protocols. See the section “A
Recommended PAP Structure” later in this chapter for a possible PAP
structure that network administrators may use to define NSAP formats.
This recommended structure is compatible with the IS-IS protocol
format.
Area ID A two octet field containing a unique ID for the area
on which the NSAP resides.
ES ID A six octet value, unique within the Area, which
identifies the end system.
NSel A one octet value. The recommended value is 01.