PAM Management Programming Manual

Introduction
PAM Management Programming Manual—142481
1-4
The PAM Subsystem’s Role Within the System
SPI transfers SCF commands to the PAM subsystem and also provides an interface for
writing management applications that perform control-and-inquiry and event
management.This manual describes how to write management applications using SPI.
ServerNet LAN Systems Access (SLSA) Subsystem
PAM uses the SLSA subsystem to access the Ethernet and token-ring LANs attached to
the Himalaya S-series server. SLSA has a logical interface (LIF) which is the point-of-
connection to SLSA for I/O clients (such as PAM).
Logical Interface (LIF)
The LIF in the SLSA subsystem corresponds to the logical interface (LIF) on the
adapter, and thus to one of the Ethernet or token-ring LANs attached to the system.
QIO Shared Memory Segment
The QIO subsystem performs efficient I/O by allowing client processes to transfer data
directly to the QIO shared memory segment and to pass a pointer to the location so that
the actual data doesn’t need to be moved again.
PAM Process
The PAM process provides the interface to the SLSA subsystem for Ethernet, LLC1 and
LLC2 applications, SNAX/XF and SNAX/APN, and EMS.
EMS makes event messages generated by the PAM process available to management
applications. EMS collects, logs, and distributes event messages that provide
information to help you monitor the network environment, analyze failures, and
recognize and handle critical problems. Figure 1-2
shows how EMS manages events.