3com WX3000 Manuel D’Utilisation

 

2-8 

Enter system view 

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Enable Option 82 support on the 
DHCP relay agent 

Required 

Disabled by default. 

Configure the strategy for the DHCP 
relay agent to process request 
packets containing Option 82 

dhcp relay information 
strategy { drop | keep | 
replace } 

Optional 

By default, the replace 
strategy is adopted 

 

z 

By default, with the Option 82 support function enabled on the DHCP relay agent, the DHCP relay 

agent will adopt the replace strategy to process the request packets containing Option 82. 

However, if other strategies are configured before, then enabling the 82 support on the DHCP relay 

agent will not change the configured strategies.  

z 

To enable Option 82, you need to perform the corresponding configuration on the DHCP server 

and the DHCP relay agent.  

 

Display the information about a specified 
DHCP server group 

display dhcp-server groupNo 

Display the information about the DHCP 
server group to which a specified VLAN 
interface is mapped 

display dhcp-server interface 
vlan-interface vlan-id 

Display the specified client address 
entries on the DHCP relay agent 

display dhcp-security [ ip-address 
| dynamic | static | tracker ]  

Available in any 
view 

Clear the statistics information of the 
specified DHCP server group 

reset dhcp-server groupNo 

Available in user 
view 

 

As shown in 

, VLAN-interface 1 on the DHCP relay agent (Switch A) connects to the network 

where DHCP clients reside. The IP address of VLAN-interface 1 is 10.10.1.1/24 and IP address of 

VLAN-interface 2 is 10.1.1.2/24 that communicates with the DHCP server 10.1.1.1/24. As shown in the 

figure below, Switch A forwards messages between DHCP clients and the DHCP server to assign IP 

addresses in subnet 10.10.1.0/24 to the clients.