Cisco ACI, What is It?

As software defined networking becomes more popular and even necessary, Cisco ACI changes the way we’ve traditionally thought about networking. Traditional networking uses an imperative model which basically means we control what the network devices do. We give them commands…
Show environment Command

To display temperature, voltage, fan, and power supply information, use the show environment command in user EXEC or privileged EXEC mode. The following outputs are from Cisco 7206VXR. To display all available syntax, use the show environment? (As shown in…
Show ip route

To display the current state of the routing table, use the show ip route command in user EXEC or privileged EXEC mode. The show ip route command is a powerful tool to use at this point in your search. You…
Show processes memory

The show memory exec command is often used to check the amount of a router’s free memory. In troubleshooting cases where router performance is the focus, this is a major command used to see the statistics about the router’s memory. To show…
Show module command

Show modules: To display the module status and information, use the show module command in user EXEC or privileged EXEC mode. This example shows how to display information for all modules on a Catalyst 6500 series switch that is configured…
Show controllers command

“I’m a little confused on what the “show controllers” commands really do… can someone clarify? Based on the output, I’m inclined to suspect that it provides mostly physical layer type information about an interface. From a troubleshooting perspective, when is…
Show interfaces

Show interfaces: Use the show interfaces EXEC command to display statistics for all interfaces configured on the router or access server. The resulting output varies, depending on the network for which an interface has been configured. show interfaces [type number]…
Cisco Show Version Command

Show version: Displays information about the router’s internal components, including the IOS version, memory, configuration register information, etc. The most common use of the show version command is to determine which version of the Cisco IOS a device is running.…