3Com Switch 7750 Configuration Guide

600 CHAPTER 57: DHCP SERVER CONFIGURATION
Interface Address
Pool-Based DHCP
Server Configuration
c
CAUTION: In the interface address pool mode, after the addresses in the interface
address pool have been assigned, the DHCP server picks IP addresses from the
global interface address pool containing the segment of the interface address pool
and assigns them to the DHCP clients. As a result, the IP addresses obtained from
global address pools and those obtained from interface address pools are not in
the same network segment, so the clients cannot interoperate with each other.
In the interface address pool mode, if the IP addresses in the same address pool
are required to be assigned to the clients on the same VLAN interface, the number
of clients that obtain IP addresses automatically cannot exceed the number of the
IP addresses that can be assigned in the interface address pool.
Configuration Overview An interface address pool is created when the interface is assigned a valid unicast
IP address and you execute the dhcp select interface command in interface view.
The IP addresses contained in it belong to the network segment where the
interface resides and are available to the interface only.
You can perform certain configurations for DHCP address pools of an interface or
multiple interfaces within specified interface ranges. Configuring for multiple
interfaces eases configuration work load and makes you to configure in a more
convenient way.
Table 470 Interface address pool-based DHCP server configuration tasks
Configuration task Description Related section
Enable DHCP Required “Enabling
DHCP” on page
601
Configure to assign the IP addresses of interface address
pools to DHCP clients
Required “Configuring to
Assign the IP
Addresses of
Interface Address
Pools to DHCP
Clients” on page
601
Configure to assign IP
addresses of DHCP
address pools to DHCP
clients
Configure to assign IP
addresses by static binding
One among
these two
options is
required. These
two options can
be configured at
the same time.
“Configuring to
Assign IP
Addresses of
DHCP Address
Pools to DHCP
Clients” on page
601
Configure to assign IP
addresses dynamically
Configure DNS services for the DHCP server Optional “Configuring
DNS Services for
the DHCP
Server” on page
603
Configure NetBIOS services for DHCP clients Optional “Configuring
NetBIOS Services
for DHCP
Clients” on page
604