3Com Switch 7750 Configuration Guide Guide

Interface Address Pool-based DHCP Server Configuration 569
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■ The dhcp server forbidden-ip command can be executed repeatedly. That is,
you can repeatedly configure IP addresses that are not dynamically assigned to
DHCP clients.
■ Use the dhcp server forbidden-ip command to configure the IP addresses that
are not assigned dynamically in global address pools and interface address
pools.
Configuring DNS
Services for the DHCP
Server
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.
On the DHCP server, 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 while the DHCP server assigns IP addresses to the DHCP
clients.
Table 443 Configure DNS services for the DHCP server
Operation Command Description
Enter system view system-view -
Configure a domain
name for DHCP
clients
Configure 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 multiple
interfaces in system
view
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 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 multiple
interfaces in system
view
dhcp server dns-list
ip-address&<1-8> {
interface
interface-type
interface-number [ to
interface-type
interface-number ] |
all }