H3C Technologies H3C SecPath F1000-E - Manual (Page 249)

3
Task Remarks
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.
IMPORTANT:
z An interface cannot serve as both the DHCP server and the DHCP
relay agent. The latest configuration takes effect.
z 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.
z The DHCP relay agent works on interfaces with IP addresses
manually configured only.
z 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.
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, that is, 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
Select Network > DHCP > DHCP Relay from the navigation tree to enter the page shown in Figure
19 . Enable or disable DHCP in the DHCP Service field. Click Display Advanced Configuration
to expand the advanced DHCP relay agent configuration field.