HP VPN Firewall Appliances Network Management Configuration Guide

171
Task Remarks
Specifying a server's IP address for the DHCP client
Configuring self-defined DHCP options
Creating a DHCP address pool
When you create a DHCP address pool, specify it as a common address pool or an extended address
pool.
To create a DHCP address pool:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Create a DHCP address pool
and enter its view.
dhcp server ip-pool pool-name
[ extended ]
No DHCP address pool is created by
default.
A common address pool and an extended address pool are different in address allocation mode
configuration. Configurations of other parameters (such as the domain name suffix and DNS server
address) for them are the same.
Configuring address allocation mode for a common address pool
CAUTION:
You can configure either a static binding or dynamic address allocation for a common address pool, bu
t
not both.
You need to specify a subnet for dynamic address allocation. A static binding is a special address pool
containing only one IP address.
• Configuring static address allocation.
Some DHCP clients, such as a WWW server, need fixed IP addresses. To provide a fixed IP
address for such 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 static address allocation:
{ 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 overwrites 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 overwrites the previous
one.
{ The IP address of the static binding cannot be an interface address of the DHCP server.
Otherwise, an IP address conflict might occur, making the bound client unable to 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.
{ The specified lease duration takes effect but the lease duration displayed by the display dhcp
server ip-in-use all command is still Unlimited.