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136 Summit 300-48 Switch Software User Guide
Status Monitoring and Statistics
• Received Byte Count (RX Byte Count) — The total number of bytes that were received by the port,
including bad or lost frames. This number includes bytes contained in the Frame Check Sequence
(FCS), but excludes bytes in the preamble.
• Received Broadcast (RX Bcast) — The total number of frames received by the port that are
addressed to a broadcast address.
• Received Multicast (RX Mcast) — The total number of frames received by the port that are
addressed to a multicast address.
Port Errors
The switch keeps track of errors for each port.
To view port transmit errors, use the following command:
show ports <portlist> txerrors
The following port transmit error information is collected by the system:
•Port Number
• Link Status — The current status of the link. Options are:
— Ready (the port is ready to accept a link).
— Active (the link is present at this port).
• Transmit Collisions (TX Coll) — The total number of collisions seen by the port, regardless of
whether a device connected to the port participated in any of the collisions.
• Transmit Late Collisions (TX Late Coll) — The total number of collisions that have occurred after
the port’s transmit window has expired.
• Transmit Deferred Frames (TX Deferred) — The total number of frames that were transmitted by
the port after the first transmission attempt was deferred by other network traffic.
• Transmit Errored Frames (TX Error) — The total number of frames that were not completely
transmitted by the port because of network errors (such as late collisions or excessive collisions).
• Transmit Parity Frames (TX Parity) — The bit summation has a parity mismatch.
To view port receive errors, use the following command:
show ports <portlist> rxerrors
The following port receive error information is collected by the switch:
• Link Status — The current status of the link. Options are:
— Ready (the port is ready to accept a link).
— Active (the link is present at this port).
• Receive Bad CRC Frames (RX CRC) — The total number of frames received by the port that were of
the correct length, but contained a bad FCS value.
• Receive Oversize Frames (RX Over) — The total number of good frames received by the port
greater than the supported maximum length of 1,522 bytes.
• Receive Undersize Frames (RX Under) — The total number of frames received by the port that were
less than 64 bytes long.