Finisar Surveyor - Manual (Page 370)

12-2
Surveyor
User’s Guide
The following packet counters are supported:
• Total Frames
• Broadcast Frames
• Multicast Frames
• Unicast Frames
• Error Frames
• Total Bytes Received
• A breakdown of the total number of error frames is provided by the error
counters.
Custom Counters
Custom counters are user-defined counters established in capture filters. When a
certain condition in the filter is satisfied, counter 1, 2, or 3 can be incremented as a
result of one of the actions taken by the capture filter. Custom counters are available
in capture mode only.
Custom counters are incremented in the MAC Statistics view as packets are
captured. By setting counters, you can visually see in the MAC Statistics view how
many frames of a certain type have been captured.
Error Counters
During receive, error events are counted as they occur. The MAC statistics view and
the table associated with the Utilization/Errors chart displays the receive error
counters.
Table 12-2 contains an alphabetical list, with descriptions, of Surveyor’s Ethernet
error counters.
.
Table 12-2. Alphabetical List and Descriptions of Ethernet Error Counters
Counter Type Description
Collision Indication The sum of CRC/Align and Fragments error counters, as these condi-
tions are usually caused by collisions. See the CRC/Align and Frag-
ments counters described below.
CRC/Align The total number of packets received that had a length between 64
and 1518 octets, inclusive, but had either a bad FCS with an integral
number of octets (FCS/CRC Error) or a bad FCS with a non-integral
number of octets (Alignment Error).