Cisco Systems IC-23 Uživatelský manuál stáhnout pdf (Strana 27)

Configuring LAN Interfaces

Configuring a LAN Extender Interface

IC-49

Cisco IOS Interface Configuration Guide

Configuring the LAN Extender

You configure the LAN Extender from the core router—either a Cisco 4000 series or Cisco 7000 series

router—as if it were simply a network interface board. The LAN Extender cannot be managed or

configured from the remote Ethernet LAN or via a Telnet session.

To configure the LAN Extender, you configure a logical LAN Extender interface on the core router and

assign the MAC address from your LAN Extender to that interface. Subsequently, during the PPP

negotiation on the serial line, the LAN Extender sends its preconfigured MAC address to the core router.

The core router then searches for an available (preconfigured) LAN Extender interface, seeking one to

which you have already assigned that MAC address. If the core router finds a match, it binds, or

associates, that LAN Extender interface to the serial line on which that MAC address was negotiated. At

this point, the LAN Extender interface is created and is operational. If the MAC address does not match

one that is configured, the connection request is rejected. Figure 6 illustrates this binding process.

Figure 6 Binding a Serial Line to a LAN Extender Interface

S2922

LAN Extender

Serial

Interface

Available LAN

Extender Interfaces

MAC

Address

00.00.0c.00.00.01

00.00.0c.00.01.03

00.00.0c.01.00.05

MAC Address

00.00.0c.01.00.05

PPP

negotiation

My MAC address

00.00.0c.01.00.05

1.)

2.)

3.)

00.00.0c.01.00.05

corresponds to

LAN Extender

interface 2 on

serial interface 2

4.)

LAN Extender interface 2,

and hence LAN extender

is bound to serial

interface 2

Core router

S0 S2

Core router

S0 S2

Core router

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 45 46

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