Chapter 11
| Interface Commands
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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
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.
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.
Frames Too Long
A count of frames received on a particular interface that exceed the
maximum permitted frame size.
Symbol Errors
For an interface operating at 100 Mb/s, the number of times there
was an invalid data symbol when a valid carrier was present.
For an interface operating in half-duplex mode at 1000 Mb/s, the
number of times the receiving media is non-idle (a carrier event) for
a period of time equal to or greater than slotTime, and during which
there was at least one occurrence of an event that causes the PHY
to indicate
'Data reception error' or 'carrier extend error' on the GMII.
For an interface operating in full-duplex mode at 1000 Mb/s, the
number of times the receiving media is non-idle (a carrier event) for
a period of time equal to or greater than minFrameSize, and during
which there was at least one occurrence of an event that causes
the PHY to indicate 'Data reception error' on the GMII
RMON Statistics
Octets
Total number of octets of data received on the network. This
statistic can be used as a reasonable indication of Ethernet
utilization.
Packets
The total number of packets (bad, broadcast and multicast)
received.
Broadcast Packets
The total number of good packets received that were directed to the
broadcast address. Note that this does not include multicast
packets.
Multicast Packets
The total number of good packets received that were directed to
this multicast address.
Undersize Packets
The total number of packets received that were less than 64 octets
long (excluding framing bits, but including FCS octets) and were
otherwise well formed.
Table 69: show interfaces counters - display description
(Continued)
Parameter
Description
