Operation Manual – DHCPH3C S5600 Series Ethernet Switches Chapter 2 DHCP Server Configuration2-82.4.4 Configuring an Address Allocation Mode for the Global Address PoolNote:You can configure either the static IP address allocation mode or the dynamic IPaddress allocation mode for a global address pool, and only one mode can beconfigured for one DHCP global address pool.For dynamic IP address allocation, you need to specify the range of the IP addresses tobe dynamically assigned. But for static IP address binding, you can regard that the IPaddress statically bound to a DHCP client comes from a special DHCP address poolthat contains only one IP address.I. Configuring the static IP address allocation modeSome DHCP clients, such as WWW servers, need fixed IP addresses. This can beachieved by binding IP addresses to the MAC addresses of these DHCP clients. Whensuch a DHCP client requests an IP address, the DHCP server searches for the IPaddress corresponding to the MAC address of the DHCP client and assigns the IPaddress to the DHCP client.When some DHCP clients send DHCP-DISCOVER packets to the DHCP server toapply for IP addresses, they construct client IDs and add them in theDHCP-DISCOVER packets. If the bindings of client IDs and IP addresses areconfigured on the DHCP server, when such a client requests an IP address, the DHCPserver will find the corresponding IP address based on the client ID and assign it to theDHCP client.Currently, only one IP address in a global DHCP address pool can be statically bound toa MAC address or a client ID.Follow these steps to configure the static IP address allocation mode:To do… Use the command… RemarksEnter system view system-view —Enter DHCP address pool view dhcp server ip-poolpool-name —Configure an IP address to bestatically boundstatic-bind ip-addressip-address [ maskmask ]RequiredBy default, no IPaddress is staticallybound.
