System information

Configuring Triggers and Alarms 151
the ten second time period, this 10 second time period is not considered as data for
this trigger.
This value ensures that the trigger will not be activated during a slow period of network
activity when a particular device or station is broadcasting.
• “Averaging period” spinbox—allows you to set the amount of time, in seconds,
that data will be collected and averaged before a value is considered for the trigger.
Sampling is every second. Values for the averaging period can be from 1 to 100
(seconds).
• “Use current filter profile” checkbox—when selected, allows you to use the current
protocol filter.
Bad IP Checksum
This trigger activates if a bad IP checksum is encountered. This usually indicates a bad
network adapter or bad cabling and is a common cause of unexplained network
slowdowns.
• “Use current filter profile” checkbox—when selected, allows you to use the current
protocol filter.
Broadcasts-Multicasts/Total Packets
This trigger activates when the ratio of broadcasts and/or multicasts is above a certain
user-specified level. This trigger is typically used to warn of broadcast/multicast storms.
• “Broadcasts/received packets ratio (%)” checkbox and spinbox—allows you to set
the ratio as a percentage of broadcasts to received packets.
• “Multicasts/received packets ratio (%)” checkbox and spinbox—allows you to set
the ratio as a percentage of multicasts to received packets.
• “Minimum number of packets (trigger level)” textbox—this is the smallest number
of packets in an averaging period that will be provided as data for the trigger. For
example, if you set the minimum number of packets to 1000 and the averaging
period to 10 seconds, then if less than 1000 packets are seen in the ten second time
period, this 10 second time period is not considered as data for the trigger.