Chapter 11
| Interface Commands
Interface Configuration
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Unknown Protocols Input The number of packets received which were discarded because of an
unknown or unsupported protocol.
QLen Output The length of the output packet queue (in packets).
Extended IF Table Stats
Multicast Input The number of packets, delivered by this sub-layer to a higher (sub-
)layer, which were addressed to a multicast address at this sub-layer.
Multicast Output The total number of packets that higher-level protocols requested be
transmitted, and which were addressed to a multicast address at this
sub-layer, including those that were discarded or not sent.
Broadcast Input The number of packets, delivered by this sub-layer to a higher (sub-
)layer, which were addressed to a broadcast address at this sub-layer.
Broadcast Output The total number of packets that higher-level protocols requested be
transmitted, and which were addressed to a broadcast address at this
sub-layer, including those that were discarded or not sent.
Etherlike Statistics
Alignment Errors The number of alignment errors (missynchronized data packets).
FCS Errors A count of frames received on a particular interface that are an integral
number of octets in length but do not pass the FCS check. This count
does not include frames received with frame-too-long or frame-too-
short error.
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 than one collision.
SQE Test Errors A count of times that the SQE TEST ERROR message is generated by the
PLS sublayer for a particular interface.
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 A count of frames for which transmission on a particular interface fails
due to excessive collisions. This counter does not increment when the
interface is operating in full-duplex mode.
Internal MAC Transmit
Errors
A count of frames for which transmission on a particular interface fails
due to an internal MAC sublayer transmit error.
Internal MAC Receive Errors A count of frames for which reception on a particular interface fails due
to an internal MAC sublayer receive error.
Frames Too Long A count of frames received on a particular interface that exceed the
maximum permitted frame size.
Carrier Sense Errors The number of times that the carrier sense condition was lost or never
asserted when attempting to transmit a frame.
Table 74: show interfaces counters - display description (Continued)
Parameter Description
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