H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 226)

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Step Remarks
2. Creating a DHCP server group
Required.
To improve reliability, you can specify several DHCP servers as a
group on the DHCP relay agent and correlate a relay agent interface
with the server group. When the interface receives requesting
messages from clients, the relay agent will forward them to all the
DHCP servers of the group.
3. Enabling the DHCP relay agent
on an interface
Required.
Enable the DHCP relay agent on an interface, and correlate the
interface with a DHCP server group.
With DHCP enabled, interfaces work in the DHCP server mode by
default.
IMPORTANT:
• An interface cannot serve as both the DHCP server and the DHCP
relay agent. The most recent configuration takes effect.
• If the DHCP relay agent is enabled on an Ethernet subinterface, a
packet received from a client on this interface must contain a VLAN
tag and the VLAN tag must be the same as the VLAN ID of the
subinterface. Otherwise, the packet is discarded.
• The DHCP relay agent works on interfaces with only IP addresses
manually configured.
• If an Ethernet subinterface serves as a DHCP relay agent, it conveys
IP addresses only to subinterfaces of DHCP clients. In this case, a
PC cannot obtain an IP address as a DHCP client.
4. Configuring and displaying
clients' IP-to-MAC bindings
Optional.
Create a static IP-to-MAC binding, and view static and dynamic
bindings.
The DHCP relay agent can dynamically record clients' IP-to-MAC
bindings after clients get IP addresses. It also supports static bindings.
You can manually configure IP-to-MAC bindings on the DHCP relay
agent so that users can access external network using fixed IP
addresses.
By default, no static binding is created.
Enabling DHCP and configuring advanced parameters for the
DHCP relay agent
1. From the navigation tree, select Network > DHCP.
2. Click the DHCP Relay tab.