| 3.1 |  | Configuring a Router |
| 3.1.7 |  | Configuring an Ethernet interface |

| An Ethernet interface can be configured from the console or a virtual terminal line. Each Ethernet interface must have an IP address and subnet mask if the interface is expected to route IP packets. To configure an Ethernet interface follow these steps: Enter global configuration mode Enter interface configuration mode Specify the interface address and subnet mask Enable the interface By default, interfaces are turned off, or disabled. To turn on or enable an interface, the command no shutdown is entered. If an interface needs to be administratively disabled for maintenance or troubleshooting the command shutdown is used to turn off the interface.
| Lab Activity Lab Exercise: Configuring an Ethernet Interface This lab is to configure an Ethernet interface on the router with an IP address and a subnet mask.
| Lab Activity e-Lab Activity: Configuring an Ethernet Interface In this lab, the students will configure an Ethernet interface on the router.
| Web Links interface fastethernet Command Syntax Description http://www.cisco.com/en/US/products/sw/ iosswrel/ps1835/products_command_reference_ chapter09186a00800874b0.html#1017394