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12-3
Counters
Error Counters
12
Fragments The total number of packets received that were less than 64 octets
and had either an FCS/CRC error or an Alignment Error.
Jabbers 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 The total number of packets received that were longer than the 1518
octets and were otherwise well formed (good FCS).
Packets Dropped The number of packets missed by Surveyor. For THGm cards, this
value should be zero.
Undersize The total number of packets received that were shorter than 64 octets
and were otherwise well formed (good FCS).
Total Tx Collision The total number of collisions that have occurred when attempting to
transmit.
Tx Attempt The number of transmission attempts that have failed.
Tx Defer 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 The number of times packets collided 16 times without successful
transmission.
Tx Excessive Defer The number of times the transmitter had to defer for greater than
3,036 byte times.
Tx Late Collision The number of collisions that occur greater than 512 bit times after a
transmission has started.
Undersize The total number of packets received that were less than 64 octets in
length and were otherwise well-formed (good FCS).
Very Long Event The number of times the transmitter is active for greater than a maxi-
mum event length. The maximum event length is 4ms to 7ms for
10Mbps network speeds and 0.4 to 0.75ms for 100Mbps network
speeds.
Table 12-2. Alphabetical List and Descriptions of Ethernet Error Counters (continued)