Learning Cisco Router Configuration with Router Simulator Toggit

Because expensive cisco router, just to learn and understand how the alternative is to use a cisco router Toggit (Router Simulator) designed to mimic common input and output using the Cisco Router.
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Definitions Router

The router is a device that serves to forward packets from a network to another network (both LAN to LAN or LAN to WAN) that hosts that exist on a network can communicate with hosts that exist on another network. The router connects network-network is the network layer of the OSI model, so technically is a Layer 3 Router-Cisco Router Gateway can also be a Layer 4 Router Gateway if it implements ACL. Routers can be a device that is designed specifically to function as a router (dedicated router), or it could also be used as a PC router.

Network Interface

Network Interface is an interface that serves to connect a host to the network. Network Interface is a hardware device that works at Layer 1 of the OSI Model. Router Network Interface required to connect the router to a LAN or WAN. Because the duty Router connect network-network, a router must have at least two network interfaces. With minimal configuration, the router can connect 2 network, as each network requires a network interface that is connected to the Router.

Configure Router

The router does not have a monitor screen to interact with the network administrator, therefore, we need a PC to set up a router.

The PC must be connected to the router with one of the following ways:
• via the console port
• through Network

Access level command

For purposes of data safety, the commands can be executed from the CLI is divided into two levels of access, namely:
• User Mode
• Privileged Mode

User Mode is intended to see the status of the router. The commands are allowed in this mode can not change the configuration of the router, so it is more secure mode when a network administrator just want to see the status of the router and do not want to change the configuration.

Privileged Mode have access to a higher level. In this mode, the network administrator can change the router configuration. Therefore, this mode should be used with great care to avoid unwanted changes to the router.

When logging on to the router first, you will be entered in user mode, with a sign prompt (>). To switch from user mode to Priviledge mode, you must execute the enable command at the prompt. The prompt will change to sign (#) when you are on privilged mode. To return to user mode of Priviledge mode, you must execute disable command at the command prompt.

Example from Toggit Simulator : 

Getting to Know the Cisco Router Mode

Cisco Learning Series of Basic 

Getting to know the Cisco Router Mode

Routers are devices that perform routing functions, the router can carry out their duties because of the configuration is made, when we are going to do and go through the configuration on a Cisco router console then there are 3 modes, ie user mode, privileged mode and global configuration mode. We need to understand the differences in these modes when configuring a router so that we would know where we were in vogue at the time of configuration and what we can do in that mode.

The modes on the router

At the moment we are doing a lot of configuration on the Cisco router commands or command contained in any mode, where the command is in a mode but is not found in other modes.

User Mode: Router>
At the moment we first login through the console then we will go into user mode, which in this mode we can not do configuration, in this mode you can only see the basic information of the router, and to see what commands are available in this mode type the command show?

Privileged Mode: Router #
From user mode to enter the privileged mode enable and type the command to return to user mode type the command to disable this mode we can see the routing information, interface protocol, the running configuration, the configuration is saved, and a little configuration example to set the clock on the router. To see the commands available in this mode type the command show?

Global Configuration Mode: Router (config #)
To get into this mode on privileged mode and enter the command configure terminal in this mode we have begun to do the configuration include: change hostname, change passwords, configuring access lists, etc., and to see the commands available in this mode type the command show?
From this mode, you can enter more specific modes such as entry into the interface mode, mode to configure routing and others.

Once we understand this fashion then we'll see what we can do in each mode when the router configuration mode hierarchy and understand the Cisco Router.