3Com SuperStack II 3300, Руководство пользователя

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72 C
HAPTER
8: S
ETTING
IP P
ARAMETERS
Administering the
Domain Name
Server Client
The Domain Name Server (DNS) client provides DNS lookup functionality
to the Switch IP ping and traceRoute features. DNS lookup allows you to
specify a hostname rather than an IP address when you use ping or
traceRoute to contact an IP station.
The DNS commands allow you specify one or more name servers
associated with a domain name. Each name server maintains a list of IP
addresses and their associated host names. When you use ping or
traceRoute with a hostname, the DNS client attempts to locate the name
on the name servers you specify. When the DNS client locates the name,
it resolves it to the IP address associated with it.
See your DNS documentation for information about how to create and
maintain lists of domain names and IP addresses on the name servers.
Displaying the DNS
Configuration
To display the current domain name and the name servers associated with
it, enter the following at the top-level menu:
ip dns display
The following example shows the IP DNS configuration display:
Modifying the DNS
Domain Name
To change the name of the currently defined domain:
1 Enter the following at the top-level menu:
ip dns domainName
The following prompt is displayed:
Enter Domain Name [dns.eg.org]:
2 Enter the new domain name. The Layer 3 Module displays the current
domain name in brackets.
Defining a New Name
Server IP Address
To define a new name server IP address associated with the current
domain name:
1 Enter the following at the top-level menu:
ip dns define