H3C Technologies H3C S10500 Series Switches - Manual (Page 50)

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To do… Use the command… Remarks
Specify the IP address
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.
Specify the lease duration for the IP
address
expired { day day [ hour hour
[ minute minute [ second
second ] ] ] | unlimited } Optional
By default, the lease duration of
the IP address is unlimited.
NOTE:
•
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.
• When the device serves as a DHCP client, you must bind the DHCP client’s ID to an IP address,
otherwise, the DHCP client cannot obtain a static IP address.
• If the interfaces on a DHCP client share the same MAC address, you must 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
For dynamic address allocation, you must configure a DHCP address pool. For each address pool, you
must specify one and only one address range, and the lease duration. A DHCP address pool can have
only one lease duration.
To avoid address conflicts, configure the DHCP server to exclude IP addresses used by the gateway or
FTP server from dynamic allocation.
Follow these steps to configure dynamic address allocation for a common address pool:
To do… Use the command… Remarks
Enter system view system-view —
Enter common address pool view dhcp server ip-pool pool-name —
Specify a subnet
network network-address
[ mask-length | mask mask ]
Required
Not specified by default.
Specify the IP address range on the
subnet for dynamic allocation network ip range min-address
max-address Optional
Not specified by default.