Before TPs can communicate with each other their LUs must be connected
in a mutual relationship called a session.
A session connects two LUs, so it is called an LU-LU session. A Session
between Two LUs illustrates this communication relationship. Multiple,
concurrent sessions between the same two LUs are called parallel LU-LU sessions.
Figure 1. A Session
between Two LUs
Sessions act as conduits that manage the movement of data between
a pair of LUs in an SNA network. Specifically, sessions deal with
things such as the quantity of data transmitted, data security, network
routing, and traffic congestion.
Sessions are maintained by their LUs. Normally, your TPs do not
deal with session characteristics. You define session characteristics
when you:
Configure your system
Use the Session Services function in the Subsystem Management
windows
