101
Step Command
Remarks
6.
(Optional.) Set the address lease
duration.
expired
{
allow-hint
| {
day
day
[
hour
hour
[
minute
minute
[
second
second
] ] ] |
unlimited
}
[
allow-hint
] }
The default setting is 1 day.
7.
(Optional.) Exclude the specified
IP addresses from dynamic
allocation.
forbidden-ip ip-address
&<1-8>
By default, all the IP
addresses in the DHCP
address pool can be
dynamically allocated.
To exclude multiple address
ranges from the address
pool, repeat this step.
8.
Return to system view.
quit
N/A
9.
(Optional.) Exclude the specified
IP addresses from dynamic
allocation globally.
dhcp server forbidden-ip
start-ip-address
[
end-ip-address
]
Except for the IP address of
the DHCP server interface,
IP addresses in all address
pools are assignable by
default.
To exclude multiple address
ranges globally, repeat this
step.
Configuring a static binding in a DHCP address pool
Some DHCP clients, such as a WWW server, need fixed IP addresses. To provide a fixed IP address
for a client, you can statically bind the MAC address or ID of the client to an IP address in a DHCP
address pool. When the client requests an IP address, the DHCP server assigns the IP address in
the static binding to the client.
Follow these guidelines when you configure a static binding:
•
One IP address can be bound to only one client MAC or client ID. You cannot modify bindings
that have been created. To change the binding for a DHCP client, you must delete the existing
binding first.
•
The IP address of a static binding cannot be the address of the DHCP server interface.
Otherwise, an IP address conflict occurs and the bound client cannot obtain an IP address
correctly.
•
Multiple interfaces on the same device might all use DHCP to request a static IP address. In this
case, use client IDs rather than the device's MAC address to identify the interfaces. Otherwise,
IP address allocation will fail.
To configure a static binding:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter DHCP address pool view.
dhcp server ip-pool pool-name
By default, no DHCP address
pool exists.
3.
Configure a static binding.
static-bind ip-address
ip-address
[
mask-length
|
mask
mask
]
{
client-identifier client-identifier
|
hardware-address
hardware-address
[
ethernet
|
token-ring
] }
By default, no static binding is
configured.
To add more static bindings,
repeat this step.
