158 System Information and Statistics Commands
Packets Received with
MAC Errors
◆ Total Packets Received with MAC Errors -
The total number of inbound packets that
contained errors preventing them from being
deliverable to a higher-layer protocol.
◆ Jabbers Received - The total number of
packets received that were longer than 1518
octets (excluding framing bits, but including
FCS octets), and had either a bad Frame Check
Sequence (FCS) with an integral number of
octets (FCS Error) or a bad FCS with a non-
integral number of octets (Alignment Error).
Note that this definition of jabber is different
than the definition in IEEE-802.3 section
8.2.1.5 (10BASE5) and section 10.3.1.4
(10BASE2). These documents define jabber as
the condition where any packet exceeds 20 ms.
The allowed range to detect jabber is between
20 ms and 150 ms.
◆ Fragments/Undersize Received - The total
number of packets received that were less than
64 octets in length (excluding framing bits but
including FCS octets).
◆ Alignment Errors - The total number of
packets received that had a length (excluding
framing bits, but including FCS octets) of
between 64 and 1518 octets, inclusive, but had a
bad Frame Check Sequence (FCS) with a non-
integral number of octets.
◆ FCS Errors - The total number of packets
received that had a length (excluding framing
bits, but including FCS octets) of between 64
and 1518 octets, inclusive, but had a bad Frame
Check Sequence (FCS) with an integral number
of octets.
◆ Overruns - The total number of frames
discarded as this port was overloaded with
incoming packets, and could not keep up with
the inflow.
Term Definition
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