Common commands for Cisco Routers

This article describes how to view the configuration information and what operations are performed in user mode and privileged mode? What more information is displayed in the privileged mode than in the user mode? The following article will help you answer your questions.
1. view the running configuration file:
Router # show running-config
The running configuration file running-config is located in the RAM of the vro and stores the configuration information currently used by the vro.
2. view the startup configuration file:
Router # show startup-config
The startup configuration file startup-config is located in the nvram of the vro and can be saved for a long time. It enters RAM when the router is started and becomes running-config.
3. view the vro version:
Router # show version
4. view the router interface status:
Router # show ip interface brief
If the interface status is "Down", it indicates that the interface is not activated. If it is "Up", it indicates that the interface has been activated.
5. view the route table:
Router # show ip route
The route table shows the networks recognized by the vro.
6. View NAT translation information:
Router # show ip nat translation
Communication between the Intranet and the Internet (for example, using the ping command) should be performed first, and then the translation can be viewed.
7. How to limit the number of connections of a single user
For example, if the number of NAT entries for a host whose IP address is 10.1.1.1 is 400, the configuration is as follows:

Ip nat translation max-entries host 10.1.1.1 400

If you want to restrict all hosts and set the NAT entry of each host to 400, you can perform the following Configuration:

Ip nat translation max-entries all-host 400