3com 5500-SI Manual De Usuario

Interface Address Pool-based DHCP Server Configuration 135

If a host accesses the Internet through domain names, DNS is needed to translate the 
domain names into the corresponding IP addresses. To enable DHCP clients to access 
the Internet through domain names, a DHCP server is required to provide DNS server 
addresses while assigning IP addresses to DHCP clients. Currently, you can configure 
up to eight DNS server addresses for a DHCP address pool.

You can configure domain names to be used by DHCP clients for address pools. After 
you do this, the DHCP server provides the domain names to the DHCP clients as well 
while the former assigns IP addresses to the DHCP clients.

Specify the IP addresses that are not 
dynamically assigned

dhcp server 
forbidden-ip 
low-ip-address [ 
high-ip-address ]

Optional
By default, all IP addresses in a 
DHCP address pool are 
available for being dynamically 
assigned.

Table 123    Configure to assign IP addresses dynamically (continued)

Table 124   Configure DNS services for DHCP clients

Enter system view

system-view

-

Configure a 
domain name for 
DHCP clients

Configure for the 
current interface

interface 
interface-type 
interface-number

Required
By default, no domain name is 
configured for DHCP clients

dhcp server 
domain-name 
domain-name

quit

Configure for 
multiple interfaces

dhcp server 
domain-name 
domain-name { 
interface 
interface-type 
interface-number [ to 
interface-type 
interface-number ] | 
all }

Configure DNS 
server addresses 
for DHCP clients

Configure for the 
current interface

interface 
interface-type 
interface-number

Required
By default, no DNS server address 
is configured.

dhcp server dns-list 
ip-address&<1-8>

quit

Configure for 
multiple interfaces

dhcp server dns-list 
ip-address&<1-8> { 
interface 
interface-type 
interface-number [ to 
interface-type 
interface-number ] | 
all }