Basic Cisco Router Configuration Commands
How to Configure a Router Hostname
To configure a name for router, use hostname command from Global Configuration mode.
Router>enable Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname omnisecu.com.r1 omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to Configure a MOTD Banner for Router
Users will be presented with a MOTD (Message of the DAY) banner every time they attempt a connection via the console port, auxiliary port, or a telnet session to router. Use the following commands to configure a MOTD message. Here the "#" character is known as a delimiting character. The banner message should be sorrounded by delimiting character and the message should not contain the delimiting character.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal omnisecu.com.r1(config)#banner motd #Welcome to omnisecu.com.r1# omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to enable DNS lookup
To configure a DNS server for your router, follow these steps.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal omnisecu.com.r1(config)#ip name-server 192.168.100.10 omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to turn off the automatic name resolution
The router is set by default to try to resolve any word that is not a command to a DNS server at address limited broadcast IP Address 255.255.255.255. We can turn off this by using the following command.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. omnisecu.com.r1(config)#no ip domain-lookup omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to assign a Local Name to an IP address
Following command assigns a host name to an IP address. Once this is completed, we can use the configured host name for telnet or ping.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. omnisecu.com.r1(config)#ip host PC001 192.168.100.122 omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to Turn on synchronous logging
If the router sends a message to the console while you're entering a command, by default the router will interrupt your work to show the message.
If you want the information sent to console not interrupt the command you are typing, turn on synchronous logging.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. omnisecu.com.r1(config)#line console 0 omnisecu.com.r1(config-line)#logging synchronous omnisecu.com.r1(config-line)#exit omnisecu.com.r1(config)#exit omnisecu.com.r1#
How to configure an inactivity time-out for automatic log-off
Sets time limit when console automatically logs off. Set to 0 0 (minutes seconds) means console never logs off.
omnisecu.com.r1>enable omnisecu.com.r1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. omnisecu.com.r1(config)#line console 0 omnisecu.com.r1(config-line)#exec-timeout 3 0 omnisecu.com.r1(config-line)#exit omnisecu.com.r1(config)#exit omnisecu.com.r1#
