Dhcp relay agent configuration example, Network requirements – H3C Technologies H3C S3600 Series Switches User Manual
Page 681
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Before enabling the DHCP relay agent to replace the XID in DHCP Inform messages, make sure that
UDP Helper is enabled on the switch.
Displaying and Maintaining DHCP Relay Agent Configuration
To do…
Use the command…
Remarks
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
Among S3600 series Ethernet switches, only S3600-EI series switches support the display
dhcp-security command.
DHCP Relay Agent Configuration Example
Network requirements
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.