Which command can be used to identify Cyclic Redundancy Check (CRC) errors on port Ethernet 1/1/1?

The show statistics ethernet 1/1/1 command is used on RUCKUS ICX switches to display detailed traffic and error counters for a specific interface. The output includes various metrics essential for troubleshooting, such as packet counts, broadcast/multicast traffic, and different types of errors. Among these are the Cyclic Redundancy Check (CRC) error counters, which are critical for identifying physical layer problems like faulty cabling, bad connectors, or malfunctioning network interface cards (NICs) that lead to frame corruption.

show interfaces brief ethernet 1/1/1: This command provides a summary of the interface's operational status (e.g., link state, speed, duplex) but lacks detailed error statistics.

show mac-address ethernet 1/1/1: This command displays the Layer 2 MAC address table entries learned on the specified port, not physical layer error counters.

show port security ethernet 1/1/1: This command is used to view the configuration and status of port security features, such as MAC address limits and violation actions.

1. RUCKUS FastIron Command Reference Guide, 08.0.95:

Section: Monitoring Commands

Page: 1598 (PDF page)

Content: The description for the show statistics command states it "Displays statistics for all ports or a specified port." The sample output on the following pages clearly shows a counter for "CRC & Alignment" errors, confirming this command is used to identify CRC errors.

2. RUCKUS ICX 7150 Switch Administration Guide, 08.0.95:

Section: Monitoring Port Statistics

Page: 228 (PDF page)

Content: This section explains how to monitor port statistics for troubleshooting. It explicitly mentions using the show statistics command to view error information, including CRC errors, to diagnose potential hardware issues. The guide notes, "A large number of CRC errors can indicate a problem with the cable or the network interface card (NIC) in the attached device."