Cisco Router Commands
Cisco Router IOS
Cisco routers are manageable devices. It means that they have the Cisco IOS software for network and internetwork management. The Cisco's IOS software delivers network services and enabled networked applications. The Cisco IOS is the CLI based software at which you can execute Cisco IOS commands.
Cisco Commands
There are more than 2,000 Cisco router commands in the latest version of Cisco router IOS software including the basic router commands along with the advanced level router commands such as Cisco wireless router commands. The Cisco router IOS have different executable modes with different prompts. You can use these modes for executing different tasks. Each mode has a set of specific commands.
Cisco IOS User Interface Fundamentals
Using a command line interface you have to keep in mind the following things
- Operations vary on different internetworking devices
- Type or paste entries in the console command modes
- Enter key instructs device to parse and execute the commands
- Two primary EXEC modes are user mode and privileged mode for executing basic Cisco commands
- Command modes have distinctive prompts
Cisco IOS Software Exec
There are two main EXEC modes for entering commands:
User Mode
Privileged (or enabled) Mode
Configured versus Unconfigured Router
After completing the booting process, the configured Cisco router will prompt in user-mode prompt while the Cisco router will prompt in setup mode for initial configuration dialogue if there is no configuration in the memory.
Cisco Router Setup Mode
The Cisco router setup mode commands are as follows:
Setup: The Initial Configuration Dialog
Router # setup
System Configuration Dialog
Continue with configuration dialog? [Yes/no]: Y
At any point you may enter a question mark "?" for help
Use ctrl-c to abort the configuration dialog at any prompt
Default settings are in square brackets "[ ]"
Basic management setup configures only enough connectivity for management of the system, extended setup will ask you to configure each interface on the system
Would you like to enter basic management setup? [Yes/no] n
Setup Interface Summary
First, would you like to see the current interface summary? [Yes]
Setup Global Parameters
Configuring global parameters:
Enter host name [router]: R1
The enable secret is the password used to protect access to Privileged and configuration modes. This password, after entered, becomes encrypted in the configuration.
Enter enable secret: Cisco
The enable password is used when you do not specify an enable secret password, with some older software versions, and boot images.
Enter enable password: sanfran
The virtual terminal password used to protect the access to the router over a network interface.
Enter virtual terminal password: sanjose
Configure SNMP Network Management? [No]:
Configure IP? [Yes]:
Setup Interface Parameters
Configuring interface parameters:
Do you want to configure Ethernet 0 interface? [No]: Y
Configure IP on this interface? [No] Y
IP address for this interface: 10.1.1.33
Subnet mask for this interface [255.0.0.0]: 255.255.255.0
Class A network is 10.0.0.0. 245 subnet bits: mask is /24
Do you want to configure serial 0 interface? [No]:
Setup Script Review and Use
The following command script was created:
[0] go to the IOS command prompt without saving this configuration[1] Return back to the setup without saving this config
[2] Save this configuration to NVRAM and exit.
Enter your selection [2]:
What are the Basic Router Commands
Following are some of the router basic commands of user and privileged exec modes that are used for verifying, copying and deleting the configuration:
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