Extreme Networks ExtremeWare XOS 10.1, Manual

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94 ExtremeWare XOS 10.1 Concepts Guide
Status Monitoring and Statistics
Port Errors
The switch keeps track of errors for each port.
To view port transmit errors, use the following command:
show ports {<port_list>} txerrors
The switch collects the following port transmit error information:
• 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 {<port_list>} rxerrors
The switch collects the following port receive error information:
• 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.
• Receive Fragmented Frames (RX Frag)—
The total number of frames received by the port were of
incorrect length and contained a bad FCS value.
• Receive Jabber Frames (RX Jab)— The total number of frames received by the port that was of
greater than the support maximum length and had a Cyclic Redundancy Check (CRC) error.
• Receive Alignment Errors (RX Align)— The total number of frames received by the port that occurs
if a frame has a CRC error and does not contain an integral number of octets.
• Receive Frames Lost (RX Lost)— The total number of frames received by the port that were lost
because of buffer overflow in the switch.