Extreme Networks ExtremeWare 7.2e, Инструкция по установке и эксплуатации

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124 ExtremeWare 7.2e Installation and 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 {mgmt | <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 {mgmt | <portlist>} rxerrors
The following port receive error information is collected by the switch:
• 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. For products that use the “i” chipset, ports with
jumbo frames enabled do not increment this counter.
• 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.