3com WXR100 3CRWXR10095A Manuel D’Utilisation

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Configuring the DHCP Server
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Option 3—Default Router. If this option is not set with the 
set
 
interface dhcp-server
 command’s default-router option, the MSS 
DHCP server can use the value set by the set ip route
 command. A 
default route configured by set ip route
 can be used if the route is in 
the DHCP client’s subnet. Otherwise, the MSS DHCP server does not 
specify a router address.
„
Option 6—Domain Name Servers. If these options are not set with the 
set interface dhcp-server command’s primary-dns and 
secondary-dns options, the MSS DHCP server uses the values set by 
the set ip dns server command.
Configuring the 
DHCP Server
You can configure the DHCP server on an individual VLAN basis. To 
configure the server, use the following command:
set interface vlan-id ip dhcp-server [enable | disable] [start 
ip-addr1
stop ip-addr2] [dns-domain domain-name] [primary-dns ip-addr
[secondary-dns ip-addr]] [default-router ip-addr]
The vlan-id can be the VLAN name or number. 
The start ip-addr1 and stop ip-addr2 options specify the beginning and 
ending addresses of the address range (also called the address pool). By 
default, all addresses except the host address of the VLAN, the network 
broadcast address, and the subnet broadcast address are included in the 
range. If you specify the range, the start address must be lower than the 
stop address, and all addresses must be in the same subnet. The IP 
interface of the VLAN must be within the same subnet but is not required 
to be within the range.
The following command enables the DHCP server on VLAN red-vlan to 
serve addresses from the 192.168.1.5 to 192.168.1.25 range:
WX1200# set interface red-vlan ip dhcp-server enable start 
192.168.1.5 stop 192.168.1.25
success: change accepted.
To remove all IP information from a VLAN, including the DHCP client and 
user-configured DHCP server, use the following command:
clear interface vlan-id ip
This command clears all IP configuration information from the interface.