Rmon Statistics Collection; Management Logs For Rmon (Ethernet-Based) Thresholds - Allied Telesis SwitchBlade x3100 Series Manual

RMON Statistics Collection

7.5.2 RMON Statistics Collection
RMON collects Ethernet statistics for each monitored interface on the system. These statistics take the form
of running counters that start from zero when a valid entry is created. Rising and falling thresholds are set to
generate logs and traps.
RMON configuration data contains the following attributes:
Interval times are controllable (defaults are set at 30 seconds and 30 minutes).
•
Two thresholds can be set:
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Rising threshold - When a statistical value rises above a threshold, a log is produced and a trap is sent to an
•
SNMP browser
Falling threshold - When a statistical value drops below a threshold, an associated log/trap is produced.
•
During the time interval, once the falling threshold is crossed, the rising threshold trap/log is produced again.
•
Figure 7-13 shows how the rising and falling thresholds affect the RMON data collection.
Rising
(200)
Falling
(100)
Rising threshold 200 crossed,
1
log/trap generated

7.5.3 Management Logs for RMON (Ethernet-Based) Thresholds

The following log examples show the management logs produced when the set thresholds (in this case, ether-
StatsBroadcastPkts for a falling value of 10 and a rising value of 100) are crossed. Refer to
stand how these thresholds work.
Management log produced when rising threshold occurs:
•
RMON003 2004-06-16 13:27:07 6071 INFO
Location : ETH:6.0
Description: etherStatsBroadcastPkts Rising Alert
Type : Absolute
Threshold : 100
Value : 0
Software Reference for SwitchBlade x3100 Series Switches (Network Management)
2
1
3
2 3 4 No logs/traps generated
, ,
Thresholds for RMON Statistics
FIGURE 7-13
4
5
6
Falling threshold 100 crossed,
5
log/trap generated
Introduction
6
Since falling threshold cr
, rising log/trap g
at
5
Figure 7-13 to under-
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