Information Technology Reference
In-Depth Information
Table6-2
show interfaces tokenring Field Descriptions (continued)
Field
Description
Last clearing
Time at which the counters that measure cumulative
statistics (such as number of bytes transmitted and
received) shown in this report were last reset to zero. Note
that variables that might affect routing (for example, load
and reliability) are not cleared when the counters are
cleared.
*** indicates the elapsed time is too large to be displayed.
0:00:00 indicates the counters were cleared more than 231
ms (and less than 232 ms) ago.
Output queue, drops
Input queue, drops
Number of packets in output and input queues. Each
number is followed by a slash, the maximum size of the
queue, and the number of packets dropped due to a full
queue.
Five minute input rate,
Five minute output
rate
Average number of bits and packets transmitted per second
in the past five minutes.
The five-minute input and output rates should be used only
as an approximation of traffic per second during a given
five-minute period. These rates are exponentially weighted
averages with a time constant of five minutes. A period of
four time constants must pass before the average will be
within 2 percent of the instantaneous rate of a uniform
stream of traffic over that period.
packets input
Total number of error-free packets received by the system.
bytes input
Total number of bytes, including data and MAC
encapsulation, in the error-free packets received by the
system.
no buffer
Number of received packets discarded because there was
no buffer space in the main system. Compare with
ignored
count. Broadcast storms on Ethernet networks and bursts of
noise on serial lines are often responsible for no input
buffer events.
broadcasts
Total number of broadcast or multicast packets received by
the interface.
runts
Number of packets that are discarded because they are
smaller than the medium's minimum packet size.
giants
Number of packets that are discarded because they exceed
the medium's maximum packet size.
CRC
The cyclic redundancy checksum generated by the
originating LAN station or far-end device does not match
the checksum calculated from the data received. On a LAN,
this usually indicates noise or transmission problems on the
LAN interface or the LAN bus itself. A high number of
CRCs is usually the result of a station transmitting bad
data.
