Useful Notes about Cisco Configuration

Few important things about cisco CLI

When we start configuring the CISCO device like router or switch , it is quite important which mode you are currently in the CLI.

Below there is classify the modes.

• User mode
  Router>
• Privileged mode
  Router #
• Global configuration mode
  Router (Config) #
• Line
  Router (Config-Line) #
• Interface
  Router (config-if) #

Basic Configuration

• Change host name

Router>en
Router>enable
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#host
Router(config)#hostname R1
R1(config)#

• DNS lookup prevention

R1>en
R1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#
R1(config)#no ip domain lookup
R1(config)#

📝 By using this we stop the name resolution function, so if you make a typo in the command, you can quickly retype it and reduce wasted time.

• Redisplay the command after outputting the debug message

R1>en
R1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#line console 0…