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Bridge Statistics 4-25
Bridging
SQE Test
Displays the number of times that the SQE Test Error message is generated by the
PLS sublayer on the selected interface.
The SQE (Signal Quality Error) Test tests the collision detect circuitry after each
transmission. If the SQE Test fails, a SQE Test Error is sent to the interface to
indicate that the collision detect circuitry is malfunctioning.
Carrier Sense
Displays the number of times that the carrier sense condition was lost or never
asserted when attempting to transmit a frame on a particular interface.
Carrier sense describes the action an interface desiring to transmit will take to
listen to the communication channel to see if any other interface is transmitting. If
a Òcarrier is sensed,Ó the sensing interface will wait a random length of time, and
then attempt to transmit.
Frame Too Long
Displays the amount of frames received on this interface that exceed the
maximum permitted frame size.
Internal MAC
The number of frames that failed to be received by the interface due to an internal
MAC sublayer receive error. These errors are only counted if a Frame Too Long,
Alignment, or FCS Error did not occur along with the internal MAC error.
Receive Errors
Displays the total number of receive errors of all types that were detected by the
selected interface while it was receiving a transmission.
Transmission Errors
Deferred
Displays the number of frames for which the Þrst transmission attempt on this
interface is delayed because the medium is busy.
Internal MAC
The number of frames for which transmission fails due to an internal MAC
sublayer transmit error. This error is only counted in this window if there have
not been corresponding Late Collisions, Excessive Collisions, or Carrier Sense
Errors.
Transmit Errors
The total of transmission errors of all types that occurred while the selected
interface was attempting to transmit frames.