3Com 3C421600A, Management Manual

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30 C
HAPTER
2: U
SING THE
C
OMMAND
L
INE
I
NTERFACE
Step Five: Configure
DNS - Optional
This section sets a Domain Name Server (DNS). If you do not wish to use
DNS, skip to “Step Six: Configure SNMP - Optional”.
1 Specify the IP address of the server you want to function as the DNS
server, which, when queried, translates host names into their
corresponding IP addresses and saves that information in a local Hosts
Table.
You can name up to 10 DNS servers using the command shown on the
next page. You must specify the order in which they are to be chosen
(highest priority: 1). This value is the
preference
number.
The RAS 1500 tries to reach each configured host three times in
round-robin fashion before issuing an error message. For instance, in the
case of three offline servers - A, B, and C, the RAS 1500 admits failure
only after trying to reach them one after the other, three times.
Use the following command:
add dns server <ip_address> preference <number> name
<server_name>
Example:
add dns server 192.75.222.182 preference 1 name farley
The DNS server is only consulted to resolve host names not found in the
Hosts Table. If you are using a name service, the Hosts Table may be left
empty. Also, issue
list dns server
and
show dns settings
commands to verify your action. You may use the
resolve name
command to learn DNS host names or numbers.
2 Specify your default domain, the Ethernet segment where your system
resides and your default. Adding this entry to the Hosts Table eliminates
the task of always specifying the domain. Use the following command:
set dns domain_name <string>
Example:
set dns domain_name 3com.com