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Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 13 SNMP
13.10.5 Alarm RMON Group
13.10.4.2 Row Creation in historyControlTable
The etherStats table and historyControl table are automatically created when the Ethernet facility is
created. History size is based upon the default history bucket located in
.
13.10.4.3 Get Requests and GetNext Requests
These PDUs are not restricted.
13.10.4.4 Row Deletion in historyControl Table
To delete a row from the table, the SetRequest PDU should contain a historyControlStatus value of 4
(invalid). A deleted row can be recreated.
13.10.4.5 Ethernet History RMON Group
The ONS 15600 SDH implements the etherHistoryTable as defined in RFC 2819. The group is created
within the bounds of the historyControlTable and does not deviate from the RFC in its design.
13.10.4.6 64-Bit etherHistoryHighCapacityTable
64-bit Ethernet history for the HC-RMON-MIB is implemented in the etherHistoryHighCapacityTable,
which is an extension of the etherHistoryTable. The etherHistoryHighCapacityTable adds four columns
for 64-bit performance monitoring data. These two tables have a one-to-one relationship. Adding or
deleting a row in one table will effect the same change in the other.
13.10.5 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.
13.10.5.1 Alarm Table
The NMS uses the alarmTable to determine and provision network performance alarmable thresholds.
13.10.5.2 Get Requests and GetNext Requests
These PDUs are not restricted.
13.10.5.3 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.
