Cisco port status command

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The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language. The Catalyst series switch is a modular system. You can see which modules are installed, and the MAC address ranges and version numbers for each module, by entering the show module command. You can view the summary or detailed information on the switch ports using the show interface status command.

Cisco port status command

It can be very useful at troubleshooting connectivity issues and physical port issues, check the status of physical ports, watch how much traffic is passing through the interface, which IP address is assigned to the interface for Layer3 interfaces etc. This command works on both Cisco Switches and Cisco Routers and has the same functionality on both types of devices. On a Layer 2 switch we can check the status and various other counters and metrics for each physical ethernet interface or for every interface on the device. The above gives me a quick status update of each available interface on the switch, on which VLAN it belongs, speed settings etc. Now if you want to dive deeper in the counters for each physical interface, we can be more specific as shown below:. The most important data you need to take into consideration are the following:. Hardware is Lance, address is b. If you have interface errors the reliability factor will decrease. The above counters are useful to check how much traffic has passed through the interface the last 5 minutes. The above counters are also useful to watch how much traffic has passed through the interface, if there were any errors or frame collisions, buffer failures etc. However, if the total number of errors is a big percentage compared to the number of packets, then you should investigate for possible interface problems. On a Layer 3 router, the show interface command is equally important to obtain crucial information about each interface for various purposes. As shown above, this shows me the IP address assigned to each physical interface, if the port is UP, if the protocol is UP etc. For example, one interface might be connected to a Frame Relay connection. The physical port might be UP but the protocol might show Down.

These features are available on all releases subsequent to the one they were introduced in, unless noted otherwise.

Optional Number of the module. If you do not specify a number, the ports on all modules are shown. Optional Number of the port on the module. If you do not specify a number, all the ports on the module are shown. Status of the port connected, notconnect, connecting, standby, faulty, inactive, shutdown, disabled, or monitor.

If you connect a port undergoing a TDR test to a BASE-T port such as that on the device, the unused pairs and are reported as faulty because the remote end does not terminate these pairs. Due to cable characteristics, you should run the TDR test multiple times to get accurate results. Do not change port status for example, remove the cable at the near or far end because the results might be inaccurate. TDR works best if the test cable is disconnected from the remote port. Otherwise, it might be difficult for you to interpret results correctly. TDR operates across four wires. TDR intent is to determine how poorly a cable is functioning rather than to locate a faulty cable. When TDR locates a faulty cable, you should still use an offline cable diagnosis tool to better diagnose the problem. This table provides release and related information for features explained in this module.

Cisco port status command

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product.

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NET As shown above, this shows me the IP address assigned to each physical interface, if the port is UP, if the protocol is UP etc. Chapter: Checking Port Status and Connectivity. Normal response—The normal response hostname is alive occurs in 1 to 10 seconds, depending on the network traffic. Depending on the reflected signal, it can determine roughly where a cable fault could be. All rights reserved. Similarly, if the software receives a packet that it is unable to deliver to the ultimate destination because it knows of no route to the destination address, it sends an ICMP Host Unreachable message to the source. TDR detects a cable fault by sending a signal along its wires. Occasionally, network devices must know the subnet mask for a particular subnetwork in the internetwork. This blog entails my own thoughts and ideas, which may not represent the thoughts of Cisco Systems Inc. Hardware is Lance, address is b. Outgoing access list is not set Inbound access list is not set. The ping command allows you to verify connectivity to remote hosts. Nice modification -. If the IP address is not resolved, the path is not identified, and an error message appears.

In order to check to see how long the port is in Up or Down status, use the show interfaces [interface id] command. This shows the last time a port sent or received traffic. Likewise, the Last input never, output never, output hang never status means the port is not in use.

To set the logout for 10 minutes and 10 seconds, enter the following command: Switch config line console 0 Switch config-line exec-timeout 10 10 To set no logout timer for console session: Switch config line console 0 Switch config-line exec-timeout 0 0 Monitoring User Sessions You can display the currently active user sessions on the switch using the show users command. Learn how your comment data is processed. Duplex setting for the port auto, full, fdx, half, hdx, a-half, a-hdx, a-full, a-fdx. Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations. Switch Switch traceroute mac ip 1. This command works on both Cisco Switches and Cisco Routers and has the same functionality on both types of devices. Search Options. Do not change port status for example, remove the cable at the near or far end because the results might be inaccurate. Contact Us Terms and Conditions. I've attached the updated script here.