Owner's Manual

340 RMON Commands
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rmon alarm
The rmon alarm global configuration command configures alarm conditions. To remove an alarm,
use the
no form of this command.
Syntax
rmon alarm index variable interval rthreshold fthreshold revent fevent [ type type ] [ startup
direction ] [ owner name ]
no rmon alarm index
• index —The alarm index. (Range: 1 - 65535)
•
variable —The object identifier of the particular variable to be sampled.
•
interval —The interval in seconds over which the data is sampled and compared with the
rising and falling thresholds. (Range: 1 - 4294967295)
•
rthreshold —Rising Threshold. (Range: 1 - 4294967295)
•
fthreshold —Falling Threshold. (Range: 1 - 4294967295)
•
revent —The Event index used when a rising threshold is crossed .(Range: 1- 65535)
•
fevent —The Event index used when a falling threshold is crossed. (Range: 1- 65535)
•
type type —The sampling method for the selected variable and calculating the value to be
compared against the thresholds. If the method is
absolute , the value of the selected
variable is compared directly with the thresholds at the end of the sampling interval. If
the method is
delta , the selected variable value at the last sample is subtracted from the
current value, and the difference compared with the thresholds.
Fragments The total number of packets received during this sampling interval that were less than 64 octets in
length (excluding framing bits but including FCS octets) had either a bad Frame Check Sequence
(FCS) with an integral number of octets (FCS Error), or a bad FCS with a non-integral number of
octets (AlignmentError). It is normal for etherHistoryFragments to increment because it counts
both runts (which are normal occurrences due to collisions) and noise hits.
Jabbers The number of packets received during this sampling interval that were longer than 1518 octets
(excluding framing bits but including FCS octets), and had either a bad Frame Check Sequence
(FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of
octets (Alignment Error).
Dropped The total number of events in which packets were dropped by the probe due to lack of resources
during this sampling interval. This number is not necessarily the number of packets dropped, it is
just the number of times this condition has been detected.
Collisions The best estimate of the total number of collisions on this Ethernet segment during this sampling
interval.