Lucent Technologies Cajun P220, Operation Manual

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Analyzing Network Performance Using RMON and Ethernet Statistics (Layer 2 & Layer 3)
17 - 4 Cajun P550/P220 Switch Operation Guide
Undersized
Packets Count of packets with a valid CRC
that violate the minimum Ethernet
packet size.
These malformed packets are most
often the result of software errors.
Possible cause: Device or
application creating non-compliant
packets.
Possible action: Use a network
analyzer to identify the transceiver
which at the source of the problem.
If necessary, replace transceiver,
network adapter, or station.
Oversized
Packets Count of packets with a valid CRC
that violate the maximum Ethernet
packet size.
These malformed packets are most
often the result of software errors.
Possible cause: Device or
application creating non-compliant
packets.
Possible action: Use a network
analyzer to identify the transceiver
which at the source of the problem.
If necessary, replace transceiver,
network adapter, or station.
Fragments Fragments or runts result from
normal collision activity in
Ethernet networks. A runt packet is
an incomplete packet that is long
enough to be detected by an
Ethernet interface. Possible causes:
• Interference on network
cabling.
• A Transceiver attached to the
Repeater is generating Signal
Quality Errors (SQE).
Possible actions (respectively):
• Inspect cable runs to see if they
are too close to noisy devices,
and check for problems with
network devices.
• Disable SQE on the Transceiver.
Table 17-1. Interpreting Ethernet Interface Statistics (Continued)
Statistic Indicates Actions