Information Technology Reference
In-Depth Information
Table6-2
show interfaces tokenring Field Descriptions (continued)
Field
Description
frame
Number of packets received incorrectly having a CRC error
and a noninteger number of octets.
overrun
Number of times the serial receiver hardware was unable to
hand receive data to a hardware buffer because the input
rate exceeded the receiver's ability to handle the data.
ignored
Number of received packets ignored by the interface
because the interface hardware ran low on internal buffers.
These buffers are different than the system buffers
mentioned previously in the buffer description. Broadcast
storms and bursts of noise can cause the ignored count to
be increased.
packets output
Total number of messages transmitted by the system.
bytes output
Total number of bytes, including data and MAC
encapsulation, transmitted by the system.
underruns
Number of times that the far-end transmitter has been
running faster than the near-end router's receiver can
handle. This may never be reported on some interfaces.
output errors
Sum of all errors that prevented the final transmission of
datagrams out of the interface being examined. Note that
this may not balance with the sum of the enumerated output
errors, as some datagrams may have more than one error
and others may have errors that do not fall into any of the
specifically tabulated categories.
collisions
Because a Token Ring cannot have collisions, this statistic
is nonzero only if an unusual event occurred when frames
were being queued or taken out of the queue by the system
software.
interface resets
The number of times an interface has been reset. The
interface may be reset by the administrator or
automatically when an internal error occurs.
restarts
Should always be zero for Token Ring interfaces.
transitions
Number of times the ring made a transition from up to
down, or vice versa. A large number of transitions indicates
a problem with the ring or the interface.
