Cisco Systems IC-23 manual Installing a LAN Extender at a Remote Site, Discovering the MAC Address

Configuring LAN Interfaces

Configuring a LAN Extender Interface

Figure 4 Expanded View of Cisco 1000 Series LAN Extender Connection

Other
networks				B Ethernet
	LEX	A	Serial
Core Router				LAN Extender

Virtual Ethernet connection

Management of the LAN Extender Interface

Remote

LAN

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Although there is a physical connection between the core router and the LAN Extender, what you actually manage is a remote Ethernet LAN. Figure 5 shows the connection you are managing, which is a LAN Extender interface connected to an Ethernet network. The virtual Ethernet connection (the serial interface and LAN Extender) has been removed from the figure, and points A and B, which in Figure 4 were separated by the virtual Ethernet connection, are now adjacent. All LAN Extender interface configuration tasks described in this chapter apply to the interface configuration shown in Figure 5.

Figure 5 LAN Extender Interface Connected to an Ethernet Network

Other networks

Core Router LEX A B Ethernet

Remote

LAN

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Installing a LAN Extender at a Remote Site

To install a LAN Extender at a remote site, refer to the Cisco 1000 Series Hardware Installation publication.

Discovering the MAC Address

After the LAN Extender has been installed at the remote site, you need to obtain its MAC address. Each LAN Extender is preconfigured with a permanent (burned-in) MAC address. The address is assigned at the factory; you cannot change it. The MAC address is printed on the LAN Extender’s packing box. (If necessary, you can also display the MAC address with the debug ppp negotiation command.) The first three octets of the MAC address (the vendor code) are always the hexadecimal digits 00.00.0C.

Upgrading Software for the LAN Extender

You can upgrade software for the LAN Extender on the host router with a TFTP server that is local to the host router.

The LAN Extender and core router communicate using the Point-to-Point Protocol (PPP). Before you can configure the LAN Extender from the core router, you must first enable PPP encapsulation on the serial interface to which the LAN Extender is connected.

Cisco IOS Interface Configuration Guide

IC-48