show ports rxerrors

show ports {port_list | stack-ports stacking-port-list} rxerrors {no-refresh | refresh}

Description

Displays real-time receive error statistics. The switch automatically refreshes the output unless otherwise specified.

Syntax Description

`port_list`	Specifies one or more ports or slots and ports.
`stacking-port-list`	Specifies one or more stacking ports or slots. Applies to SummitStack and the Summit family switches only.
no-refresh	Specifies that auto-refresh is disabled. The output provides a real-time snapshot of the receive errors at the time the command is issued. This setting is not saved.
refresh	Specifies a continous refresh of output.

Default

The switch automatically refreshes the output.

Usage Guidelines

If you do not specify a port number or range of ports, receive error statistics are displayed for all ports.

If you do not specify the no-refresh parameter, the switch automatically refreshes the output (this is the default behavior).

If you specify the no-refresh parameter, the output provides a snapshot of the real-time receive error statistics at the time you issue the command and displays the output in page-by-page mode (this was the default behavior in ExtremeXOS 11.2 and earlier). This setting is not saved; therefore, you must specify the no-refresh parameter each time you want a snapshot of the port receive errors.

This status information may be useful for your technical support representative if you have a network problem.

Collected Port Receive Error Information

The switch collects the following port receive error information:

Port Number.
Link State—The current state of the link. Options are:
- Active (A)—The link is present at this port.
- Ready (R)—The port is ready to accept a link.
- Loopback (L)—The port is in Loopback mode.
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 Jabber)—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 packets dropped due to the memory queue being full.

Port Monitoring Display Keys

For information about the available port monitoring display keys, see the show ports statistics command.

Example

The following command displays receive error statistics for all ports on the Summit family switches with auto-refresh enabled (the default behavior):

show ports rxerrors

The following is sample truncated output from this command:

Port Rx Error Monitor Tue Jul  5 15:07:13 UTC 2005
Port    Link     Rx      Rx      Rx        Rx      Rx         Rx      Rx
State   Crc    Over    Under     Frag    Jabber    Align      Lost
========================================================================
1       R        0       0        0        0       0          0      0
2       R        0       0        0        0       0          0      0
3       R        0       0        0        0       0          0      0
4       R        0       0        0        0       0          0      0
5       R        0       0        0        0       0          0      0
6       R        0       0        0        0       0          0      0
7       R        0       0        0        0       0          0      0
8       R        0       0        0        0       0          0      0
9       R        0       0        0        0       0          0      0
10      R        0       0        0        0       0          0      0
11      R        0       0        0        0       0          0      0
12      R        0       0        0        0       0          0      0
13      R        0       0        0        0       0          0      0
14      R        0       0        0        0       0          0      0
15      R        0       0        0        0       0          0      0
16      R        0       0        0        0       0          0      0
17      R        0       0        0        0       0          0      0
========================================================================
Link State: A-Active, R-Ready, NP-Port Not Present, L-Loopback
0->Clear Counters  U->page up  D->page down ESC->exit

History

This command was first available in ExtremeXOS 10.1.

The link state information was updated to include NP-Port not present in ExtremeXOS 11.2.

Support for the auto-refresh functionality and the no-refresh parameter were added in ExtremeXOS 11.3. Auto-refresh continually updates the display. The no-refresh parameter takes a real-time snapshot of the display at the time you issue the command.

The refresh keyword was added in ExtremeXOS 16.1.

Platform Availability

This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.

The stack-ports option is available only on SummitStack and the Summit family switches.

Published August 2017prev | next

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