PAM Programming Manual

Introduction
PAM Programming Manual—142482
1-4
The PAM Subsystem’s Role Within the System
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.
The event-management activities shown in Figure 1-2
occur as follows:
1. The PAM process reports the event by sending an event message to the local EMS
event collector.
2. The EMS event collector sends the event message to the EMS event log.
3. The application opens an EMS consumer distributor and requests an event message.
4. The distributor reads the log and returns to the application the next event message
that satisfies the conditions of the filter. (An application installs an EMS filter that
specifies the event messages that the application wants to receive.)
Figure 1-2. PAM Process and EMS
002CDT .CDD
Event Collector
($0)
Event
Log
Management
Application
Event Messages
1
2
3
4
Consumer
Distributor
Filter
PAM