Installing and Administering OSI Transport Services

Chapter 1 63
HP OTS/9000 Resources
A Recommended PAP Structure
A Recommended PAP Structure
Here is an example of a PAP structure that may either be used with a
current allocation format that allows the PAP to be defined (such as
ANSI), or with a temporary AP.
The last portion of the PAP should have the following structure:
Figure 1-23
User Defined
IDP
DSP
length (octets) 6
Domain
Area ES NSel
22 1
20 octets
User Defined A unique, user defined number.
Domain ID A two octet field containing a unique ID for the
routing domain on which the NSAP resides.
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, that
identifies the end system. Possible values that may
go here are:
If the NSAP is to be used over 802.3, the MAC
address may be used.
If the NSAP is to be used over X.25, and the X.121
address space is 12 digits or less, the X.121 address
may be used. The X.121 address is entered as BCD
digits, two digits per octet. If the X.121 address has
an odd length, pad the last octet with F.
NSel A one octet value. The recommended value for OTS
is 01.