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Catalyst 6500 Series Switch Command Reference—Release7.6
78-15328-01
Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands
show counters
32-bit counters
rxCRCAlignErrors Number of packets received that had a length (excluding framing bits, but including FCS
octets) between 64 and 1518 octets, inclusive, and had either a b ad FCS with a n in tegral
number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment
Error).
rxUndersizedPkts Number of packets received that were less than 64 octets long (excluding framing bits, but
including FCS octets) and were otherwise well-formed.
rxOversizedPkts Number of packets received that were longer than 1518 octets (excluding framing bits, but
including FCS octets) and were otherwise well-formed.
rxFragmentPkts2Number of packets received that were less than 64 octets in length (excluding framing bits
but including FCS octets) and had either a bad FCS with an integral number of octets (FCS
Error) or a bad FCS with a non-integral number of octets (Alignment Error).
rxJabbers3Number of packets received that were longer than 1518 octets (excluding framing bits, but
including FCS octets), and had either a bad FCS with an integral number of octets (FCS
Error) or a bad FCS with a non-integral number of octets (Alignment Error).
txCollisions4The best estimate of the total number of collisions on this Ethernet segment.
The value returned will depend on the location of the RMON probe. Section 8.2.1.3
(10BASE5) and section 10.3.1.3 (10BASE2) of IEEE standard 802.3 states that a station
must detect a collision in the receive mode if three or more stations are transmitting
simultaneously. A repeater port must detect a collision when two or more stations are
transmitting simultaneously. Thus, a probe placed on a repeater port could record more
collisions than a probe connected to a station on the same segment would. Probe location
plays a much smaller role when considering 10BASE-T.
ifInErrors For packet-oriented interfaces, the number of inbound p ackets t hat co nt aine d erro rs
preventing them from being deliverable to a higher-layer protocol. For character-oriented or
fixed-length interfaces, the number of inbound transmission units that contained errors
preventing them from being deliverable to a higher-layer protocol.
ifOutErrors Number of octets transmitted out of the interface, including framing characters.
ifInDiscards Number of inbound packets that were chosen to be discarded even though no errors had bee n
detected to prevent their delivery to a higher-layer protocol. One possible reason for
discarding such a packet could be to free up buffer space.
ifInUnknownProtos Number of inbound packets with unknown protocols.
ifOutDiscards Number of inbound packets chosen to be discarded even though no errors had been detected
to prevent their delivery to a higher-layer protocol. One possible reason for discarding such
a packet could be to free up buffer space.
txDelayExceededDiscards Number of frames discarded by this port due to excessive transmit delay.
txCRC Number of CRC errors.
linkChange Number of times the port toggled be tw een a co nnec t st ate to a n on- co nne ct stat e.
Dot3 counters version 1
dot3StatsAlignmentErrors5A count of frames received on a particul ar interf ace tha t are not an inte gral n umber of o ctets
in length and do not pass the FCS check.
dot3StatsFCSErrors6A count of frames received on a particular interface that are an integral number of octets in
length but do not pass the FCS check.
Table2-28 show counters Command Output Fields (continued)
Field Description