Configuring Ip Address Assignment Mode - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
So, you can configure the parameters (such as domain name) that are common to all
levels in the address pool structure or some subnets only for the network segment or
for corresponding subnets.
The display dhcp server tree command displays the tree-like structure of address
pool, where address pools on the same level are sorted by the time they are created.
The dhcp server ip-pool command can be used to create a global DHCP address
pool and enter the corresponding address pool view. If the address pool already exists,
this command brings you to the address pool view directly.
Perform the following configuration in system view.
Table 13-5 Create a global DHCP address pool
Create a DHCP address pool and enter
the corresponding DHCP address pool
view
Remove a DHCP address pool
By default, no global DHCP address pool is created.
Note that a VLAN interface address pool is created by the system after a legal unicast
IP address is assigned to the VLAN interface and you specify to assign IP addresses in
VLAN interface address pool by using the dhcp select interface command in VLAN
interface view.

13.3.2 Configuring IP Address Assignment Mode

IP address can be assigned in two modes: static binding and dynamic assignment. You
can statically bind an IP address in an address pool to the MAC address of a client or
configure a address range to allow the DHCP server dynamic allocate the addresses in
the range to DHCP clients. The two modes cannot coexist in a global DHCP address
pool, but they can coexist in a VLAN interface address pool (but those that are
dynamically assigned have the same network segment as that of the IP address of the
VLAN interface).
For the dynamic assignment mode, you must specify the range of the addresses to be
dynamically assigned. A global DHCP address pool whose IP addresses are statically
bound to DHCP clients is actually a special kind of DHCP address pool.
I. Configuring static address binding for a global DHCP address pool
fixed IP address to the MAC address of a DHCP client who needs fixed IP address.
After that, when the client requests for an IP address, the DHCP server finds (according
to the MAC address) and assigns the fixed IP address to the client. At present, only
one-to-one MAC-IP binding is supported for global DHCP address pool.
Operation
13-7
Chapter 13 DHCP Configuration
Command
dhcp server ip-pool pool-name
undo dhcp server ip-pool pool-name