A router is a layer 3 device used to forward packets from one network to another. It forwards the packet through one of its ports on the basis of destination IP address and the entry in the routing table. By using a routing table, it finds an optimized path between the source and destination network.
Let’s discuss the Cisco router’s different modes.
Modes of router – There are mainly 5 modes in the router:
User execution mode – As soon as the interface up message appears and press enter, the router> prompt will pop up. This is called user execution mode. This mode is limited to some monitoring commands.
Privileged mode – As we type enable to user mode, we enter into Privileged mode where we can view and change the configuration of the router. Different commands like show running-configuration, show IP interface brief, etc can run on this mode which is used for troubleshooting purposes.
Global configuration mode – As we type configure terminal to the user mode, we will enter into the global configuration mode. Commands entered in these modes are called global commands and they affect the running configuration of the router. In this mode, a different configuration like making a local database on the router by providing username and password can set enable and secret password, etc.
Interface configuration mode – In this mode, only the configuration of interfaces is done. Assigning an IP address to an interface, bringing up the interface are the common tasks done in this mode.
ROMMON mode – We can enter this mode when we interrupt the boot process of the router. Generally, we enter in this mode while the password recovery process or Backing up of IOS on devices like TFTP server. It is like the BIOS mode of a PC.
Entering and exiting in different modes:
Modes
Access method
prompt
Exit method
user execution mode
login
router>
use logout command
privilege mode
use enable command in user mode
router#
use disable command to enter user mode
global configuration mode
use configure terminal command
router(config)#
use the exit command to enter into privilege mode
Interface mode
use interface command and specify an interface in global configuration mode
router(config-if)#
use the exit command to enter into global configuration mode or use the end command to enter into privilege mode.
ROMMON mode
press ctrl+break key while boot process or use reload command in privilege mode.
ROMMON 1>
use continue command
Cisco Routers operate in different modes, each of which has its own advantages and disadvantages. The three primary modes of operation for Cisco Routers are:
User EXEC Mode
Privileged EXEC Mode
Configuration Mode
Here are the advantages and disadvantages of each mode:
User EXEC Mode: Advantages:
Provides basic access to the router.
Allows users to execute only a limited number of commands.
Helps in monitoring the router’s status, interface statistics, and troubleshooting.
Disadvantages:
Users can only execute a limited number of commands.
Users have no privilege to modify the router’s configuration.
Privileged EXEC Mode: Advantages:
Provides access to all router commands.
Enables users to configure and manage the router’s functions.
Allows users to monitor the system’s operations and network traffic.
Disadvantages:
Users can potentially make configuration errors, which can disrupt the network operations.
Configuration Mode: Advantages:
Enables users to configure the router’s settings and parameters.
Provides access to all configuration options.
Disadvantages:
Users must have a thorough understanding of the router configuration settings and options.
Users can potentially make configuration errors, which can disrupt the network operations.
each mode has its own advantages and disadvantages. It is important to use each mode appropriately and with caution to ensure the proper functioning and security of the network.
Configuration – The user execution mode:
router>
Entering into privilege mode from user execution mode:
router>enablerouter#
Exiting from privilege mode to user execution mode:
router#disablerouter>
Entering in global configuration mode from privilege mode:
The router has three command-line modes. There's a User EXEC mode, the Privileged EXEC mode, and the Global Configuration mode. I'm going to show you each one of these modes as well as how to access them and what is available. First, the User EXEC mode, sometimes referred to simply as User mode.
Privileged Exec Mode refers to an escalated operating mode in computer systems, also known as Enable mode. It allows users to execute almost any command on the device after entering the 'enable' command at the IOS prompt.
Privileged executes on a privilege level. It is also known as master mode and system mode. The process has unrestricted access to the software such as hardware, software, etc. So, it is also known as kernel mode. Privileged mode is an authority to perform the functions on a computer system.
There are five command modes: global configuration mode, interface configuration mode, subinterface configuration mode, router configuration mode, and line configuration mode.
There are a few LACP modes: “active”, “passive” and “on”. Switch(config)#interface port-channel 5 Then you need to assign the physical ports and specify LACP mode.
It's usually best to enable every mode offered by your router, rather then a subset of those modes. All devices, including older devices, can then connect using the fastest radio mode they support. This also helps reduce interference from nearby legacy networks and devices.
Functionality: The primary difference lies in functionality. A router in router mode creates and manages a network, handling IP assignments, traffic routing, security, and more. An access point in AP mode expands or adds wireless capabilities to a network but does not manage the network's core functions.
If set, the router will prompt you for a password. Once in Privileged Mode, you will notice the prompt changes from ">" to a "#" to indicate that we are now in Privileged Mode.
By default, Cisco routers have three levels of privilege—zero, user, and privileged. Zero-level access allows only five commands—logout, enable, disable, help, and exit. User level (level 1) provides very limited read-only access to the router, and privileged level (level 15) provides complete control over the router.
Configuration Mode refers to a state in which the CAN module is initialized and not allowed to enter while a transmission is occurring. In this mode, the module does not transmit or receive, the error counters are reset, and the interrupt flags remain unchanged.
Use the EXEC mode for setting, viewing, and testing system operations. In general, the user EXEC commands allow you to connect to remote devices, change terminal line settings on a temporary basis, perform basic tests, and list system information.
ROMmon (ROM Monitor) is a low-level software program stored in the switch's read-only memory (ROM). It provides a basic set of commands and functionalities that allow you to perform tasks such as booting the switch, recovering from a failed boot process, or troubleshooting.
Hobby: Flower arranging, Yo-yoing, Tai chi, Rowing, Macrame, Urban exploration, Knife making
Introduction: My name is Madonna Wisozk, I am a attractive, healthy, thoughtful, faithful, open, vivacious, zany person who loves writing and wants to share my knowledge and understanding with you.
We notice you're using an ad blocker
Without advertising income, we can't keep making this site awesome for you.
