Chapter 1: Introduction to the EIU 43

Logs, alarms, and OMs

In general, the subsystems that generate logs, alarms, and OMs do not have significant changes apart from the standard DMS-100 reporting sub-systems.

CAUTION

Possible loss of information

If a telnet session drops, logs and OMs may be lost.

Log reports

All logs from the EIU conform to the DMS OAM infrastructure. Log messages are formatted in the DMS-core for display using the standard DMS log system.

Alarms

The EIU uses the DMS alarm system to report faults. Alarms are raised by major maintenance state changes (usually brought on by hardware problems or overload conditions). In addition, the MAP interface displays a composite alarm banner across the top of the screen. This banner displays alarms with the most urgent priority; as maintenance personnel clear the highest priority alarms, next in priority display for each subsystem. In a healthy DMS-100 switch (that is, operations are normal), there are few alarms occurring.

Operational measurements

The EIU uses the DMS OM collection system to collect and distribute operational measurements. The DMS OM subsystem also generates simple reports. OMs can be transferred to “down-stream” processors for more detailed analysis.

In general, operational measurements can be used to determine performance and capacity in operational components. General types of operational measurements gathered by the switch include the following:

error counts

I/O counts (operations completed)

CPU occupancy

DMS-100 Family EIU User Guide TELECOM12

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Cabletron Systems DMS-100 manual Logs, alarms, and OMs, Possible loss of information, Log reports, Alarms