2-18z The IP addresses statically bound in interface address pools and the interface IP addresses mustbe in the same network segment.z There is no limit to the number of IP addresses statically bound in an interface address pool, but theIP addresses statically bound in interface address pools and the interface IP addresses must be inthe same segment.z An IP address can be statically bound to only one MAC address or one client ID. A MAC address orclient ID can be bound with only one IP address statically.z The IP address to be statically bound cannot be an interface IP address of the DHCP server;otherwise the static binding does not take effect.Configuring the dynamic IP address allocation modeAs an interface-based address pool is created after the interface is assigned a valid unicast IP address,the IP addresses contained in the address pool belong to the network segment where the interfaceresides in and are available to the interface only. So specifying the range of the IP addresses to bedynamically assigned is unnecessary.To avoid address conflicts, the DHCP server automatically excludes IP addresses (used by the gateway,FTP server and so forth) specified with the dhcp server forbidden-ip command from dynamicallocation.To avoid IP address conflicts, the IP addresses to be dynamically assigned to DHCP clients are thosenot occupied by specific network devices (such as gateways and FTP servers).The lease time can differ with address pools. But that of the IP addresses of the same address pool arethe same. Lease time is not inherited, that is to say, the lease time of a child address pool is not affectedby the configuration of the parent address pool.Follow these steps to configure the dynamic IP address allocation mode:To do… Use the command… RemarksEnter system view system-view —interface interface-typeinterface-numberdhcp server expired { day day[ hour hour [ minute minute ] ] |unlimited }Configure forthe currentinterfacequitConfigure thelease timeConfiguremultipleinterfaces insystem viewdhcp server expired { day day[ hour hour [ minute minute ] ] |unlimited } { interface interface-typeinterface-number [ to interface-typeinterface-number ] | all }OptionalThe default lease time is one day.Specify the IP addresses thatare not dynamically assigneddhcp server forbidden-iplow-ip-address [ high-ip-address ]OptionalBy default, all IP addresses in aDHCP address pool are availablefor being dynamically assigned.
