H3C Technologies H3C S7500E Series Switches - Manual (Page 49)

5-6
To do… Use the command… Remarks
Enter system view system-view —
Enter common address pool view dhcp server ip-pool pool-name —
Specify the IP address of the binding
static-bind ip-address ip-address
[ mask-length | mask mask ]
Required
No IP addresses are statically
bound by default.
Specify the MAC
address
static-bind mac-address
mac-address
Specify the
MAC address
or client ID
Specify the client ID
static-bind client-identifier
client-identifier
Required to configure either of
the two
Neither is bound statically by
default.
z Use the static-bind ip-address command together with static-bind mac-address or static-bind
client-identifier to accomplish a static binding configuration.
z 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.
z 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.
z 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.
z 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.
z You need to configure the static binding of a DHCP client’s ID to IP address, or the static binding
of a BOOTP client's MAC to IP address on the DHCP server; otherwise, the DHCP or BOOTP
client cannot obtain a static IP address.
z 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: