4-14 2 0 0 0 - A 2 - G B 2 2 - 0 0Send OAM Loopback1 Type “5” on the ATM Configuration menu (Figure 4.13) to select SendOAM Loopback. The IAD displays a list of all configured F4 OAM portsand VPI values.2 Type the port on which to send the OAM Loopback and press Enter. TheIAD performs a loopback test on the selected port and reports the results,whether successful or unsuccessful.3 Press any key to display the ATM Configuration menu.Configure EmptyCells To configure Empty Cells, follow the steps below.1 Type “6” on the ATM Configuration menu (Figure 4.13), to selectConfigure EmptyCells. The IAD displays the current status (“Idle” or“Unassigned”) and prompts you to change it.2 Type “1” to select Idle cells, or type “2” to select Unassigned cells.NOTICE: Empty cell IAD settings must match far-end settings.Router ConfigurationThis section describes how to configure the IAD as a router. You mayconfigure the IAD as a router or a bridge, depending on your application.Optionally, you may also configure some ports for routing and some ports forbridging. For example, you might use a bridge connection for Internet trafficand use a separate routed port for remote management. Alternatively, you canconfigure the bridge port on the WAN side with IPoBridge to use the bridgedconnection for remote management. Refer to Basic Bridge Setup Tasks onpage 4-28.A router is a network layer device that uses one or more metrics to determinethe optimal path along which network traffic should be forwarded. Routersforward packets from one network to another based on network layerinformation.A router generally improves overall efficiency for a complex network, but abridge provides better speed and flexibility for the overall network.Basic Router Setup TasksTo configure the IAD as a router, complete the following tasks:• Configure IP addresses on the LAN and WAN ports (page 4-16)• Enable RIP poisoned reverse (recommended) (page 4-20), add a static route(page 4-18), or add a default route (page 4-19)• Disable bridging globally (page 4-31) or by port (page 4-31)• Disable Spanning Tree Protocol (Spanning Tree) globally (page 4-32) or byport (page 4-33)
