The Absolute top 10 show Commands Everybody Needs To Know in Cisco Routers
Some commands in the Cisco router configuration are just irreplaceable. The ‘show’ commands are the most widely used in Cisco routers. Here is a list of the 10 mostly used of these ‘show’ commands.
1. show running-config
This command is your true best friend. It shows the complete configuration that is running currently.
2. show startup-config
This command shows the configuration that is saved on the NVRAM. It is helpful in knowing the configuration that will be applied the next time the routers is reloaded.
3. show interface
This command shows status and statistics regarding interfaces. This command is almost always needed in troubleshooting routing and link issues.
4. show ip route
This command shows the routing table. This table helps you in finding out the next hop for each and every routable packet. It is the first indicator to point a problem in routing.
5. show ip protocols
This command shows the routing protocols used in the router and what networks are these protocols advertising. It also shows the sources of routing updates received at this router.
6. show access-list
This command shows the contents of each access-list. but not where each access-list is applied.
7. show ip interface
This command displays information about IP protocol and the interface. Very quick way to see the immediate status of your interfaces
8. show cdp neighbor detail
This command displays detailed information about the neighboring devices like IP addresses, platforms, and host names. can be used in finding out how devices are connected to each other when you have no clear drawn network map.
9. show version
This command shows detailed information about the IOS. It shows the file name of the IOS along with the version of the IOS and value of the configuration register.
10. show flash or show slot0:
This command is used to view the contents of the flash and the size of the IOS file(s) and the size of the flash and how much of it is free. It is necessary in upgrading or installing the IOS file.