D-Link DES-6300 User Manual page 222

Modular L3 Ethernet Switch User's Guide
♦ Fragments – Indicates the number of packets received less than 64 octets long and had a FCS
during the sampling session.
♦ Jabbers – Indicates the number of packets received more than 1,518 octets long and had a
FCS during the sampling session.
♦ Collisions – Estimates the total number of packet collision that occurred during the sampling
session. Collisions are detected when repeater ports detect two or more stations transmit
simultaneously.
♦ Utilization – Estimates the main physical layer network usage on an interface during the
session sampling. The value is reflected hundreds of percent.
Alarm Table
Displays a list of all alarm entries, created using the Element Statistics or the Port Statistics.
To generate Alarms based on the traffic handled by the device, the alarm is first set in the graph
window.
To set an Alarm:
1. Display the Element Statistics Graph window.
2. In the Alarm Definition area click New. The New Alarm screen opens:
Figure 6- 200. New Alarm window
The New Alarm window displays the following parameters:
♦ Alarm Interval – The value used is Time (in seconds). The default is the value specified in the
graph Sample Time parameter. Modifications are done by changing the Sample Time
parameters. Sample Time settings are as follows:
◊
Delta – Counter is reset.
◊
Absolute – ROS monitors the counter for the defined interval.
♦ Alarm Variable – The selected MIB variable.
♦ Sample Time – There are two Sample Time settings:
◊
Delta – The counter is reset at the times defined by the interval. This is the default.
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