Installation guide

Network Setup
4-19
3. Click the Details button to view packet level statistics of any user defined interface. For more
information, see Viewing Virtual Interface Statistics on page 4-20.
4. Click the Graph button to view a graphical representation of the switch virtual interface statistics.
For more information, see Viewing the Virtual Interface Statistics Graph on page 4-21.
Packets In Error Displays the number of error packets coming into the interface. It
includes:
• Runt frames — Packets shorter than the minimum
Ethernet frame length (64 bytes).
• CRC errors — The Cyclical Redundancy Check (CRC) is
the 4 byte field at the end of every frame the receiving
station uses to interpret if the frame is valid. If the CRC
value computed by the interface does not match the
value at the end of frame, it is considered as a CRC error.
• Late collisions — A late collision is any collision that
occurs after the first 64 octets of data have been sent by
the sending station. Late collisions are not normal and
are usually the result of out of specification cabling or a
malfunctioning device.
• Misaligned frames — A misaligned frame is a frame that
somehow gets out of sync with the receiving station’s
receive clock recovery circuit. Misalignment is reported if
the frame ends with a CRC error and extra bits are also
detected.
Bytes Out Displays the number of bytes going out on the interface.
Packets Out Displays the number of packets going out on the interface.
Packets Out Dropped Displays the number of dropped packets going out of the interface,
due to saturated output queues assigned to the interface processor
or the physical device/software module. Packets can be dropped
due to collisions as well.
Packets Out Error Displays the number of error packets going out of the interface,
including frame forming errors or malformed packets transmitted
over the interface.