Chapter 11
| Interface Commands
Interface Configuration
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Unicast Input The number of subnetwork-unicast packets delivered to a higher-layer
protocol.
Unicast Output The total number of packets that higher-level protocols requested be
transmitted to a subnetwork-unicast address, including those that
were discarded or not sent.
Discard Input The number of inbound packets which were chosen to be discarded
even though no errors had been detected to prevent their being
deliverable to a higher-layer protocol. One possible reason for
discarding such a packet could be to free up buffer space.
Discard Output The number of outbound packets which were chosen to be discarded
even though no errors had been detected to prevent their being
transmitted. One possible reason for discarding such a packet could be
to free up buffer space.
Error Input The number of inbound packets that contained errors preventing them
from being deliverable to a higher-layer protocol.
Error Output The number of outbound packets that could not be transmitted
because of errors.
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.
Table 74: show interfaces counters - display description (Continued)
Parameter Description
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