On production networks, a description can be helpful in troubleshooting by providing information about the type of network to which the interface is connected. The description text is limited to 240 characters. It is good practice to configure a description on each interface. Optionally, the interface could also be configured with a short description. (This is similar to powering on the interface.) The interface must also be connected to another device (a hub, a switch, or another router) for the physical layer to be active. To enable an interface, it must be activated using the no shutdown command. Activated: By default, LAN and WAN interfaces are not activated ( shutdown).If using IPv4, configured with an address and a subnet mask: Use the ip address ip-address subnet-mask interface configuration command.For example, G2 ISRs have one or two integrated Gigabit Ethernet interfaces and High-Speed WAN Interface Card (HWIC) slots to accommodate other types of network interfaces, including serial, DSL, and cable interfaces. Routers support LANs and WANs and can interconnect different types of networks therefore, they support many types of interfaces. For example, Layer 2 switches support LANs and, therefore, have multiple FastEthernet or Gigabit Ethernet ports.
One distinguishing feature between switches and routers is the type of interfaces supported by each. Configure an IPv4 Router Interface (1.1.3.2)
Go to the online course to use the Syntax Checker in the fifth graphic to configure basic settings on R2. Activity 1.1.3.1: Configure Basic Settings on R2
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