Configuring Dns; Understanding How Dns Works - Cisco WS-C6506 Software Manual

Configuring DNS

This chapter describes how to configure the Domain Name System (DNS) on the Catalyst 6500 series
switches.
For complete syntax and usage information for the commands that are used in this chapter, refer to the
Note
Catalyst 6500 Series Switch Command Reference publication.
This chapter consists of these sections:
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•
•

Understanding How DNS Works

DNS is a distributed database with which you can map the host names to the IP addresses through the
DNS protocol from a DNS server. When you configure DNS on the switch, you can substitute the host
name for the IP address with all IP commands, such as ping, telnet, upload, and download.
To use DNS, you must have a DNS name server on your network.
You can specify a primary DNS name server on the switch and two backup servers. The first server that
is specified is the primary server unless you explicitly identify the primary server. The switch sends the
DNS queries to the primary server first. If the query to the primary server fails, the backup servers are
queried.
OL-8978-04
Understanding How DNS Works, page 30-1
DNS Default Configuration, page 30-2
Configuring DNS on the Switch, page 30-2
C H A P T E R
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
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