Dhcp Relay Configuration Example - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
Disable debugging for DHCP
Relay

13.4.4 DHCP Relay Configuration Example

I. Network requirements
As shown in Figure 13-4, two DHCP clients located at the same network segment
(10.110.0.0) are connected to a switch through a port in VLAN 2. The switch, acting as
a DHCP relay, is supposed to forward DHCP packets between the two DHCP clients
and the DHCP server with the IP address of 202.38.1.2.
II. Network diagram
DHCP client DHCP client
Sw itch ( DHCP Relay ) Sw itch ( DHCP Relay )
Figure 13-4 Network diagram for DHCP Relay
III. Configuration procedure
Enter system view.
<SW8800>system-view
Create VLAN 2.
[SW8800]vlan 2
Create Vlan-interface 2 and enter VLAN interface view.
[SW8800]interface Vlan-interface 2
Assign an IP address to Vlan-interface 2.
[SW8800-Vlan-interface2]ip address 10.110.1.1 255.255.0.0
Specify to forward DHCP packets to a remote DHCP server.
[SW8800-Vlan-interface2]dhcp select relay
Configure the IP address of the DHCP server to which VLAN 2 sends DHCP packets.
Operation
DHCP cli e nt DHCP cli e nt
10.110.0.0 10.110.0.0
Ethernet Ethernet
10.110.1.1 10.110.1.1
Internet Internet
Command
undo debugging dhcp relay { all| packet | error |
event }
DHCP Server DHCP Server
202.38.1.2 202.38.1.2
202.38.1.1 202.38.1.1
Ethernet Ethernet
202.38.0.0 202.38.0.0
13-24
Chapter 13 DHCP Configuration