DHCP Server Configuration Commands 829interface vlan-interface vlan-id [ to vlan-interface vlan-id ]: Specifies one VLANinterface, or a range of VLAN interfaces.all: Specifies all VLAN interfaces.DescriptionUse the dhcp server expired command to set the IP address lease time for theDHCP address pool of current VLAN interface, or for the DHCP address pool(s) ofthe specified VLAN interface(s).Use the undo dhcp server expired command to revert to the default IP addresslease time for the DHCP address pool of current VLAN interface, or for the DHCPaddress pool(s) of the specified VLAN interface(s).The default lease time is one day.Related command: expired.Example# Set the IP address lease time of the DHCP address pool of VLAN interface 1 tounlimited. system-viewSystem View: return to User View with Ctrl+Z.[SW8800] interface vlan-interface 1[3Com-Vlan-interface1] dhcp server expired unlimiteddhcp server forbidden-ip Syntaxdhcp server forbidden-ip low-ip-address [ high-ip-address ]undo dhcp server forbidden-ip low-ip-address [ high-ip-address ]ViewSystem viewParameterlow-ip-address: Minimum IP address in the forbidden IP address range.high-ip-address: The highest IP address in the forbidden IP address range. Notethat the value of this argument must be larger than (or equal to) that of thelow-ip-address argument. If you do not provide this argument, then the forbiddenIP address range contains only the IP address specified by the low-ip-addressargument.DescriptionUse the dhcp server forbidden-ip command to forbid a range of IP addresses tobe automatically assigned to DHCP clients.Use the undo dhcp server forbidden-ip command to cancel the forbiddance.All IP addresses in a DHCP address pool can be automatically assigned by default.
