Fabric Watch Monitoring in a DRM Environment - Application Notes

Fabric Watch Overview

Application Notes – Fabric Watch Monitoring in a DRM Environment 9

Event Policies

Whenever Fabric Watch detects that a threshold is exceeded (a counter is above an upper boundary or

below a lower boundary), an event is generated. Two types of event policies control the behavior of the

event and can be configured with a Telnet session. The policies of an area are configured to be either a

triggered or continuous event.

• Triggered event—A single event is registered when a boundary is exceeded. The event is not

generated again until the threshold value is cleared (value returns within the boundaries) and then

once again exceeded. For example, if the switch temperature exceeds its threshold value, a

triggered event is generated when the boundary is crossed. The event is not repeated while the

temperature remains above the upper boundary. After dropping within the acceptable level,

another triggered event will occur when the boundary is again exceeded.

• Continuous event—An event is registered when a boundary is exceeded at each defined time

interval. For example, if a switch exceeds its temperature threshold, Fabric Watch activates an

event notification at every time interval (for example, every minute) until the temperature returns

to an acceptable level.

Fabric Watch recognizes six types of events. All but one event type is supported in both triggered or

continuous event modes. Table 2 describes the six types of events.

Alarms

Fabric Watch can notify SAN managers of events with five types of alarms. The alarm types are:

• SNMP Trap

• Switch Event Log Entry

• Port Log Locking

• Remote Asynchronous Notification

• E-mail Alert

Table 2: Fabric Watch Event Types

Event Type Description Notification Event Types

Started Element monitoring is in a started condition.

A started event is not referenced, so no

alarm is generated.

Triggered and continuous

Below A counter is below the lower boundary. Triggered and continuous

Above A counter is above the upper boundary. Triggered and continuous

Exceeded A counter is below the lower boundary or

above the upper boundary.

Triggered and continuous

Changed A counter value has changed. Triggered and continuous

In-between A counter falls below the upper boundary

minus a buffer, or rises above the lower

boundary plus a buffer. Must be preceded

by an above or below event. If the buffer is

set to zero, this event is suppressed.

Triggered