H3C Technologies H3C S3100 Series Switches - Manual (Page 515)

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Configuring the Interface Address Pool Based DHCP Server
In the interface address pool mode, after the addresses in the interface address pool have been
assigned, the DHCP server picks IP addresses from the global interface address pool containing the
network segment of the interface address pool and assigns them to the DHCP clients. As a result, the IP
addresses obtained from global address pools and those obtained from interface address pools are not
on the same network segment, so the clients cannot communicate with each other.
Therefore, in the interface address pool mode, if the DHCP clients in a VLAN need to obtain IP
addresses from the same network segment, the number of DHCP clients cannot exceed the number of
the IP addresses assignable in the VLAN interface address pool.
Configuration Task List
An interface address pool is created when the interface is assigned a valid unicast IP address and you
execute the dhcp select interface command in interface view. The IP addresses contained in it belong
to the network segment where the interface resides in and are available to the interface only.
You can perform certain configurations for DHCP address pools of an interface or multiple interfaces
within specified interface ranges. Configuring for multiple interfaces eases configuration work load and
makes you to configure in a more convenient way.
Complete the following tasks to configure the interface address pool based DHCP server: