Digital Networks North America DNswitch 800 - Manual (Page 59)

DNswitch 800 Configuring and Monitoring the Switch 49
Port Statistics
Use the Port Statistics menu to display Etherlike or RMON statistics for
any port on the switch. Select the required port. The statistics displayed
are indicated in the following figure and table.
Etherlike Statistics
Etherlike Statistics display key statistics from the Ethernet-like MIB for
each port. Error statistics on the traffic passing through each port are
displayed. This information can be used to identify potential problems with
the switch (such as a faulty port or unusually heavy loading). Values
displayed have been accumulated since the last system reboot.
Figure 3-41. Etherlike Statistics
Parameter Description
Alignment Errors The number of frames received that are not an integral number
of octets in length and do not pass the FCS check.
FCS Errors The number of frames received that are an integral number of
octets in length but do not pass the FCS check.
Single Collision
Frames* The number of successfully transmitted frames for which
transmission is inhibited by exactly one collision.
Multiple Collision
Frames* A count of successfully transmitted frames for which
transmission is inhibited by more that one collision.
SQE Test Errors* A count of times that the SQE TEST ERROR message is
generated by the PLS sublayer.
Deferred
Transmissions* A count of frames for which the first transmission attempt on a
particular interface is delayed because the medium was busy.
Late Collisions The number of times that a collision is detected later than 512
bit-times into the transmission of a packet.
Excessive
Collisions* The number of frames for which transmission failed due to
excessive collisions.
Internal Mac
Transmit Errors* The number of frames for which transmission failed due to an
internal MAC sublayer transmit error.
Carrier Sense
Errors* The number of times that the carrier sense condition was lost or
never asserted when attempting to transmit a frame.
Frames Too Long The number of frames received that exceed the maximum
permitted frame size.
Internal Mac
Receive Errors* The number of frames for which reception failed due to an
internal MAC sublayer receive error.
* The reported values will always be zero because these statistics are not
supported by the internal chip set.