3Com Switch 8800 Configuration Guide Chapter 13 DHCP Configuration
13-10
You can set multiple IP address ranges that are not assigned automatically by
executing the dhcp server forbidden-ip command multiple times.
13.3.4 Configuring Lease Time For DHCP Address Pool You can configure different lease times for different DHCP address pools. But you can
configure only one lease time for one DHCP address pool and all the address in the
same pool will have the same lease time.
I. Configuring a lease time for a global DHCP address pool
Perform the following configuration in DHCP address pool view.
Table 13-10 Configure a lease time for a global DHCP address pool
Operation Command
Configure a lease time for a global
DHCP address pool expired { day day [ hour hour [ minute
minute ] ] | unlimited }
Restore the lease time of a global DHCP
address pool to the default value undo expired
II. Configuring a lease time for current VLAN interface
Perform the following configuration in VLAN interface view.
Table 13-11 Configure a lease time for current VLAN interface
Operation Command
Configure a lease time for DHCP
address pool of current VLAN interface dhcp server expired { day day [ hour
hour [ minute minute ] ] | unlimited }
Restore the lease time of DHCP address
pool of current VLAN interface to the
default value undo dhcp server expired
III. Configuring a lease time for multiple VLAN interfaces
Perform the following configuration in system view.
Table 13-12 Configure a lease time for multiple VLAN interfaces
Operation Command
Configure a lease time for DHCP
address pools of multiple VLAN
interfaces
dhcp server expired { day day [ hour
hour [ minute minute ] ] | unlimited }
{ interface vlan-interface vlan_id [ to
vlan-interface vlan_id ] | all }