Default Dns Configuration; Setting Up Dns - Cisco Catalyst 2950 Software Configuration Manual

Chapter 7 Administering the Switch

Default DNS Configuration

Table 7-3
Table 7-3
Feature
DNS enable state
DNS default domain name
DNS servers

Setting Up DNS

Beginning in privileged EXEC mode, follow these steps to set up your switch to use the DNS:
Command
Step 1 configure terminal
Step 2
ip domain-name name
Step 3 ip name-server server-address1
[server-address2 ...
server-address6]
Step 4
ip domain-lookup
Step 5 end
Step 6
show running-config
Step 7
copy running-config
startup-config
If you use the switch IP address as its hostname, the IP address is used and no DNS query occurs. If you
configure a hostname that contains no periods (.), a period followed by the default domain name is
appended to the hostname before the DNS query is made to map the name to an IP address. The default
78-11380-04
shows the default DNS configuration.
Default DNS Configuration
Purpose
Enter global configuration mode.
Define a default domain name that the software uses to complete unqualified
host names (names without a dotted-decimal domain name).
Do not include the initial period that separates an unqualified name from the
domain name.
At boot time, no domain name is configured; however, if the switch
configuration comes from a BOOTP or Dynamic Host Configuration Protocol
(DHCP) server, then the default domain name might be set by the BOOTP or
DHCP server (if the servers were configured with this information).
Specify the address of one or more name servers to use for name and address
resolution.
You can specify up to six name servers. Separate each server address with a
space. The first server specified is the primary server. The switch sends DNS
queries to the primary server first. If that query fails, the backup servers are
queried.
(Optional) Enable DNS-based host name-to-address translation on your switch.
This feature is enabled by default.
If your network devices require connectivity with devices in networks for which
you do not control name assignment, you can dynamically assign device names
that uniquely identify your devices by using the global Internet naming scheme
(DNS).
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Configuring a System Name and Prompt
Default Setting
Enabled.
None configured.
No name server addresses are configured.
Catalyst 2950 Desktop Switch Software Configuration Guide
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