HP-UX SNAplus2 General Information (October 1998)

Chapter 2 29
Introducing SNAplus2
SNAplus2 Resources
can also be dependent LUs, if they are used to
communicate with host computers that use older
versions of SNA host software.
Type 6.2 LUs that are used to communicate with peer
computers, or with newer SNA software on host
computers, are referred to as “independent LUs.” They
can support multiple user sessions simultaneously.
SNAplus2 supports the following type 0–3 LUs:
Display
Display LUs support 3270 display sessions, with the
models representing different screen sizes:
• Model 2 - 80 x 24
• Model 3 - 80 x 32
• Model 4 - 80 x 43
• Model 5 - 132 x 27
Printer
Printer LUs support printer sessions:
• 3270 printer
• SCS printer
RJE
RJE model LUs support RJE workstations.
Unrestricted
Unrestricted LUs support LUA and upstream LUs that
provide host communication with downstream LUs
through PU concentration.
LUs can also be grouped into LU pools. A user session
can be assigned to a pool of LUs, rather than to a
specific LU, so that it can use any available LU within
that pool.
Modes and class of service (COS) definitions
A mode specifies a set of characteristics that a local LU
(type 6.2) uses to communicate with its partner LU.
These characteristics include information on the way
data is transmitted between the two LUs (such as
maximum RU lengths and pacing window sizes), and
on whether the LUs can establish parallel sessions.