Finisar Surveyor manual Counters

Counters 12

Error Counters

Table 12-2. Alphabetical List and Descriptions of Ethernet Error Counters (continued)

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.

12-3