3Com 7757 Configuration Manual page 603

n
Configuring DNS
Services for the DHCP
Server
Table 474 Configure to assign IP addresses dynamically
Operation
Specify the IP addresses that are
not dynamically assigned
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.
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 475 Configure DNS services for the DHCP server
Operation
Enter system view
Configure a Configure the
domain name for current interface
DHCP clients
Configure multiple
interfaces in system
view
Interface Address Pool-Based DHCP Server Configuration
Command
dhcp server forbidden-ip
low-ip-address
[ high-ip-address ]
Command
system-view
interface interface-type
interface-number
dhcp server
domain-name
domain-name
quit
dhcp server
domain-name
domain-name { interfac
e interface-type
interface-number [ to
interface-type
interface-number ] | all }
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Description
Optional
By default, all IP addresses
in a DHCP address pool are
available for being
dynamically assigned.
Description
-
Required
By default, no domain
name is configured for
DHCP clients