History Control Table; Row Creation In Historycontroltable; Get Requests And Getnext Requests; Row Deletion In Historycontrol Table - Cisco ONS 15600 Reference Manual

13.9.4 History Control RMON Group

13.9.4.1 History Control Table

The RMON is sampled at one of four possible intervals. Each interval, or period, contains specific
history values (also called buckets).
buckets.
The historyControlTable maximum row size is determined by multiplying the number of ports on a card
by the number of sampling periods. For example, an ONS 15600 E100 card contains 24 ports;
multiplying this number by the four periods allows 96 rows in the table. An E1000 card contains 14 ports.
Multiplied by four periods, the table allows 56 table rows.
Table 13-6
Sampling Periods
(historyControlValue Variable)
15 minutes
24 hours
1 minute
60 minutes

13.9.4.2 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

13.9.4.3 Get Requests and GetNext Requests

These PDUs are not restricted.

13.9.4.4 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.

13.9.4.5 Ethernet History RMON Group

The ONS 15600 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.

13.9.4.6 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 create the same change in the other.
Cisco ONS 15600 Reference Manual, R8.0
13-14
Table 13-6
RMON History Control Periods and History Categories
Total Values, or Buckets
(historyControl Variable)
32
7
60
24
lists the four sampling periods and corresponding
Table
Chapter 13 SNMP
13-6.