Specifications
show rmon stats
12-4 Configuring RMON
Table 12‐2providesanexplanationofthecommandoutput.
Table 12-2 show rmon stats Output Details
Output What It Displays...
Port Port designation.
Owner Name of the entity that configured this entry. Monitor is default.
Data Source Data source of the statistics being displayed.
Drop Events Total number of times that the switch was forced to discard frames due to lack of
available switch device resources. This does not display the number of frames
dropped, only the number of times the switch was forced to discard frames.
Collisions Total number of collisions that have occurred on this interface.
Jabbers Total number of frames that were greater than 1518 bytes and had either a bad FCS
or a bad CRC.
Packets Total number of frames (including bad frames, broadcast frames, and multicast
frames) received on this interface.
Broadcast Pkts Total number of good frames that were directed to the broadcast address. This value
does not include multicast frames.
Multicast Pkts Total number of good frames that were directed to the multicast address. This value
does not include broadcast frames.
CRC Errors Number of frames with bad Cyclic Redundancy Checks (CRC) received from the
network. The CRC is a 4-byte field in the data frame that ensures that the data
received is the same as the data that was originally sent.
Undersize Pkts Number of frames received containing less than the minimum Ethernet frame size of
64 bytes (not including the preamble) but having a valid CRC.
Oversize Pkts Number of frames received that exceeded 1518 data bytes (not including the
preamble) but had a valid CRC.
Fragments Number of received frames that are not the minimum number of bytes in length, or
received frames that had a bad or missing Frame Check Sequence (FCS), were less
than 64 bytes in length (excluding framing bits, but including FCS bytes) and had an
invalid CRC. It is normal for this value to increment since fragments are a normal
result of collisions in a half-duplex network.
Packets Total number of packets, including bad, broadcast and multicast.
Octets Total number of octets (bytes) of data, including those in bad frames, received on this
interface.
0 – 64 Octets Total number of frames, including bad frames, received that were 64 bytes in length
(excluding framing bits, but including FCS bytes).
65 – 127 Octets Total number of frames, including bad frames, received that were between 65 and
127 bytes in length (excluding framing bits, but including FCS bytes).
128 – 255 Octets Total number of frames, including bad frames, received that were between 128 and
255 bytes in length (excluding framing bits, but including FCS bytes).
256 – 511 Octets Total number of frames, including bad frames, received that were between 256 and
511 bytes in length (excluding framing bits, but including FCS bytes).
512 – 1023 Octets Total number of frames, including bad frames, received that were between 512 and
1023 bytes in length (excluding framing bits, but including FCS bytes).
1024 – 1518 Octets Total number of frames, including bad frames, received that were between 1024 and
1518 bytes in length (excluding framing bits, but including FCS bytes).