HP 4800G Series Configuration Manual page 274

Use the static-bind ip-address command together with static-bind mac-address or static-bind
client-identifier to accomplish a static binding configuration.
In a DHCP address pool, if you execute the static-bind mac-address command before the
static-bind client-identifier command, the latter will overwrite the former and vice versa.
If you use the static-bind ip-address, static-bind mac-address, or static-bind client-identifier
command repeatedly in the DHCP address pool, the new configuration will overwrite the previous
one.
The IP address of the static binding cannot be an interface address of the DHCP server. Otherwise,
an IP address conflict may occur and the bound client cannot obtain an IP address correctly.
The ID of the static binding must be identical to the ID displayed by using the display dhcp client
verbose command on the client. Otherwise, the client cannot obtain an IP address.
If the interfaces on a DHCP client share the same MAC address, you need to specify the client ID,
rather than MAC address, in a static binding to identify the requesting interface; otherwise, the
client may fail to obtain an IP address.
Configuring dynamic address allocation
You need to specify one and only one address range using a mask for the dynamic address allocation.
To avoid address conflicts, the DHCP server excludes IP addresses used by the gateway or FTP server
from dynamic allocation.
You can specify the lease duration for a DHCP address pool different from others, and a DHCP address
pool can only have the same lease duration. A lease does not enjoy the inheritance attribute.
Follow these steps to configure dynamic address allocation for a common address pool:
To do...
Enter system view
Enter common address pool
view
Specify an IP address range
Specify the address lease
duration
Return to system view
Exclude IP addresses from
automatic allocation
Use the command...
system-view
dhcp server ip-pool
pool-name
network network-address
[ mask-length | mask mask ]
expired { day day [ hour hour
[ minute minute ] ] | unlimited }
quit
dhcp server forbidden-ip
low-ip-address
[ high-ip-address ]
2-6
Remarks
—
—
Required
Not specified by default.
Optional
One day by default.
—
Optional
Except IP addresses of the
DHCP server interfaces, all
addresses in the DHCP
address pool are assignable by
default.