Extreme Networks ExtremeWare XOS 11.3, Manual

Page: 183 / 698

Using the Port Monitoring Display Keys
ExtremeWare XOS 11.3 Concepts Guide
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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 Errors)—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 Lost Frames (TX Lost)—The total number of transmit frames that do not get completely
transmitted because of buffer problems (FIFO underflow).
●
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 {no-refresh}
The switch collects the following port receive error information:
●
Port Number
●
Link Status—The current status of the link. Options are:
■
Active (A)—The link is present at this port.
■
Ready (R)—The port is ready to accept a link.
■
Not Present (NP)—The port is configured, but the module is not installed in the slot (modular
switches only).
●
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 that were
of incorrect length and contained a bad FCS value.
●
Receive Jabber Frames (RX Jabber)—The total number of frames received by the port that were
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 with a CRC
error and not containing 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.
Using the Port Monitoring Display Keys
Table 21 describes the keys used to control the displays that appear if you issue any of the
show ports
commands without specifying the
no-refresh
parameter (this is the default behavior).