Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

Page 26-7

The internal 

BOOTP/DHCP

 relay is configured using the 

UDP

 forwarding feature in the switch, 

available through the 

 command. See UDP Relay Configuration Screen on page 26-3.

This application example shows a network with two AutoTracker Groups, each with multiple 
segments. All network clients are 

DHCP

-ready and the 

DHCP

 server resides on just one of the 

groups. This example is much like the first application example, except that the 

BOOTP

 relay 

function is configured inside the switch.

During initialization, each network client forwards a 

DHCP

 request frame to the 

DHCP

 server 

using the local broadcast address. For those stations locally attached, the frame will simply be 
switched.

In the example above, the 

DHCP

 server and clients in the same group must be members of 

the same 

VLAN

 so that the policies match (they could also all be members of the default 

VLAN

). One way to accomplish this is to use an IP protocol policy that places all IP frames in 

the same 

VLAN

. An IP network policy would not work in this case because the 

DHCP

 clients 

will not have an IP network address until after they communicate with the 

DHCP

 server.

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