Show Commands

Using the show commands to examine router performance

There are several show commands that can be used to enable the administrator to monitor and examine the current router status

Some of the most common show commands are listed in the following table with a simple explanation of their use.

Requirement

Cisco Command

View version information show version
View current configuration (DRAM) show running-config
View startup configuration (NVRAM) show startup-config
Show IOS file and flash space show flash
Shows all logs that the router has in its memory show log
View the interface status of interface e0 show interface e0
Overview all interfaces on the router show ip interfaces brief
View type of serial cable on s0 show controllers 0 (note the space between the ‘s’ and the ‘0’)
Display a summary of connected cdp devices show cdp neighbor
Display detailed information on all devices show cdp entry *
Display current routing protocols show ip protocols
Display IP routing table show ip route
Display access lists, this includes the number of displayed matches show access-lists

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