During transmit or receive, error events are counted as they occur. The MAC statistics view and the table associated with the Utilization/Errors chart displays the transmit or receive error counters. Click on the counter names below for information on counters.
The Token Ring NIC adapter must support the reporting of these error counters for OPV-PE to display them.
RECEIVE ERROR COUNTERS TRANSMIT ERROR COUNTERS
Alignment/CRC Total Tx Collision
Collision Indication Tx Attempt
Fragments Tx Defer
Jabbers Tx Excessive Collision
Drop Events Tx Late Collision
Undersize Very Long Event
Packets Dropped
CRC and Alignment Error Counter:
A counter that shows 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).
Collision Indication:
This counter is the sum of alignment errors and fragment errors, both of which are typically caused by a collision.
Fragments Counter:
A counter showing the total number of packets received that were less than 64 octets and had either an FCS/CRC error or an Alignment Error.
Jabbers Counter:
A counter that shows the total number of packets that were received that were longer than 1518 octets and had either an FCS/CRC error or an Alignment Error.
Oversize Counter:
A counter showing the total number of packets received that were longer than the 1518 octets and were otherwise well formed (good FCS).
Drop Events Counter:
A counter that shows the total number of events in which packets were dropped by the probe due to lack of resources. Note that this number is not necessarily the number of packets dropped; it is just the number of times this condition was detected.
Undersize Counter:
A counter showing the total number of packets received that were less than 64 octets in length and were otherwise well-formed (good FCS).
Packets Dropped Counter:
A counter showing the number of packets missed by OPV-PE. For OPV-LA cards, this value should be zero.
Total Tx Collision Counter:
A counter showing the total number of collisions that have occurred when attempting to transmit.
Tx Attempt Counter:
A counter of the number of transmission attempts that have failed.
Tx Defer Counter:
A counter that shows the number of times the transmitter had transmit data available and was ready to transmit but had to defer transmission due to sensing other traffic.
Tx Excessive Collision Counter:
A counter that shows the number of times packets collided 16 times without successful transmission.
Tx Excessive Defer Counter:
A counter that shows the number of times the transmitter had to defer for greater than 3,036 byte times.
Tx Late Collision Counter:
A counter that shows the number of collisions that occur greater than 512 bit times after a transmission has started.
Very Long Event Counter:
A counter that shows the number of times the transmitter is active for greater than a maximum event length. The maximum event length is 4ms to 7ms for 10Mbps network speeds and .4 to .75ms for 100Mbps network speeds.