H3C LS-5100-16P-SI-OVS-H3 Configuration page 19

DHCP
H3C Low-End Ethernet Switches Configuration Examples
[SwitchA-Vlan-interface25] dhcp-server 2
# Configure the IP address of VLAN-interface17 as 172.16.2.5/30 for forwarding DHCP
packets from the Lab DHCP Server to a non-local segment.
[SwitchA-Vlan-interface25] quit
[SwitchA] interface Vlan-interface 17
[SwitchA-Vlan-interface17] ip add 172.16.2.5 30
# Configure the address checking function on the DHCP relay agent. Make sure you
configure the IP addresses and MAC addresses of the two DHCP servers as static
entries for the security function.
[SwitchA-Vlan-interface17] quit
[SwitchA] dhcp-security static 192.168.0.3 000D-88F8-4E71
[SwitchA] dhcp-security static 192.168.17.1 0010-5ce9-1dea
[SwitchA] interface Vlan-interface 10
[SwitchA-Vlan-interface10] address-check enable
[SwitchA-Vlan-interface10] quit
[SwitchA] interface vlan-interface 25
[SwitchA-Vlan-interface25] address-check enable
[SwitchA-Vlan-interface25] quit
# Configure the address entry update interval on the DHCP relay agent.
[SwitchA] dhcp relay hand enable
[SwitchA] dhcp-security tracker 60
# Enable the DHCP relay agent to support DHCP Option 82 and adopt the strategy of
keeping the original filed upon receiving DHCP messages carrying Option 82.
[SwitchA] dhcp relay information enable
[SwitchA] dhcp relay information strategy keep
# Enable the DHCP relay agent to detect unauthorized DHCP servers.
[SwitchA] dhcp-server detect
# Enable UDP-Helper so that the IRF Fabric can operate in the DHCP relay agent
mode.
[SwitchA] udp-helper enable
# To ensure normal forwarding of DHCP packets across network segments, you need
configure a routing protocol and advertise the network segments of interfaces. The
following configuration uses RIP as an example. For the configuration of other routing
protocols, see the parts covering routing protocols in product manuals.
[SwitchA] rip
[SwitchA-rip] network 192.168.10.0
[SwitchA-rip] network 192.168.19.0
[SwitchA-rip] network 172.16.0.0
Chapter 2 Configuration Examples
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