Alarm Rmon Group; Alarm Table; Get Requests And Getnext Requests; Row Deletion In Alarmtable - Cisco ONS 15600 Reference Manual

Chapter 13 SNMP

13.9.4.7 Alarm RMON Group

The Alarm group consists of the alarmTable, which periodically compares sampled values with
configured thresholds and raises an event if a threshold is crossed. This group requires the
implementation of the event group, which follows this section.

13.9.4.8 Alarm Table

The NMS uses the alarmTable to determine and provision network performance alarmable thresholds.

13.9.4.9 Get Requests and GetNext Requests

These PDUs are not restricted.

13.9.4.10 Row Deletion in alarmTable

To delete a row from the table, the SetRequest PDU should contain an alarmStatus value of 4 (invalid).
A deleted row can be recreated. Entries in this table are preserved if the SNMP agent is restarted.

13.9.4.11 Event RMON Group

The event group controls event generation and notification. It consists of two tables: the eventTable,
which is a read-only list of events to be generated, and the logTable, which is a writable set of data
describing a logged event. The ONS 15600 implements the logTable as specified in RFC 2819.

13.9.4.12 Event Table

The eventTable is read-only and unprovisionable. The table contains one row for rising alarms and
another for falling ones. This table has the following restrictions:
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13.9.4.13 Log Table

The logTable is implemented exactly as specified in RFC 2819. The table is based upon data that is
locally cached in a controller card. If there is a controller card protection switch, the existing logTable
is cleared and a new one is started on the newly active controller card. The table contains as many rows
as provided by the alarm controller.
The eventType is always "log-and-trap (4)".
The eventCommunity value is always a zero-length string, indicating that this event causes the trap
to be despatched to all provisioned destinations.
The eventOwner column value is always "monitor."
The eventStatus column value is always "valid(1)".
13.9.4 History Control RMON Group
Cisco ONS 15600 Reference Manual, R8.0
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