The final section shows the physical mac address of the device, the model of the device and importantly the system serial number. You can also see how many physical interfaces the device has and of what type and also how many virtual interfaces are supported.Ĭisco WS-C3650-12X48UQ (MIPS) processor (revision F0) with 832395K/6147K bytes of memory.Ģ048K bytes of non-volatile configuration memory.Ģ53984K bytes of Crash Files at crashinfo. The next section details the amount of system memory the device has installed and the amount of DRAM or physical memory. Smart Licensing Status: REGISTERED/AUTHORIZED You can also see if Smart licensing is in use or if traditional right to use licensing is installed. The next section shows the licence packages that are installed and in use. Last reload reason: Power Failure or Unknown System restarted at 16:59:45 UTC Tue Dec 15 2020 System returned to ROM by Power Failure or Unknown at 18:56:54 BST Fri Jul 10 2020 Uptime for this control processor is 2 weeks, 22 hours, 51 minutes This can be useful to understand the reason for an unexpected reboot as a power cut will show as power failure.ĪSW_CORE_SWITCH_1 uptime is 2 weeks, 22 hours, 49 minutes The next part of the output shows how long the device has been online for and the reason for the last reload.
The first few lines show which version of IOS software the device is running.Ĭisco IOS Software, Catalyst 元 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 16.9.5, RELEASE SOFTWARE (fc1) This command shows a lot of useful outputs and will show different information depending on the device, model etc. This can be useful if a mistake is made in the running-configuration and you need to revert, you can either copy the startup-configuration back into running memory or you can pull the power and reload the device which will load the old configuration.Ĭopy running-configuration startup-configurationĬopy startup-configuration running-configuration Command: show version When changes are made to a device these changes are made to the running-configuration only and need to be written to memory before the changes are permanently made to the startup-configuration. It is this configuration that is loaded into memory when the device is first booted. This command is the same as the above show running-configuration command except this will output the configuration that is stored in NVRAM. More system:running-config Command: show startup-configuration To see the whole output at once use the command terminal length 0 before entering the show running-config command.Īny passwords or shared keys are usually encrypted and therefore not visible in the output, however it is possible to show the plain text output of shared keys for RADIUS servers or VPN connections in the running-configuration by using the command Pressing the enter key displays one line at a time and pressing the space bar displays one whole page at a time. This command will output all of the current configuration that is running in RAM memory of the device to the user’s terminal one page at a time. To get into “Privileged EXEC” mode, connect to the device (e.g via console, SSH, Telnet) and use the enable command: Also, all of the commands below must be run from the “ Privileged EXEC” mode which is denoted with a pound sign (#) such as: Note that most of the commands below work both for Routers and Switches as well. Important “Show Commands” for Cisco Routers
You can download the commands as a PDF document at the end of this article as well.
In this article I have created the following Cisco Show Commands Cheat Sheet with brief description of the most important and most useful commands you will need as a Cisco Network Professional (both for IOS Routers and Switches). They are crucial when troubleshooting problems in the network or for displaying useful and critical information from the router or switch. There are commands that configure the device to perform a certain function and also there are commands that extract information from the device and the whole network in general.Ĭisco “ show commands” belong to the second category above. There are a few different categories of commands on Cisco devices. If you are a networking professional that is operating and supporting Cisco devices and networks, then learning some important “ show commands” is essential.