Dns Client Commands - NETGEAR GSM7212 - ProSafe Switch Cli Reference Manual

Command Line Interface Reference for the ProSafe 7200 Series Layer-2 Switches, Software Ver-

4.5 DNS Client Commands

The Domain Name System (DNS) is an Internet directory service. DNS is used to translate
domain names to IP addresses. A DNS Client (often referred to as a resolver) uses a
defined protocol to obtain resource data from name servers on its network.
The DNS Client component must be globally enabled or disabled. When the client is
enabled, it provides a hostname lookup service to other components in the switch. The
client contacts one or more DNS servers to resolve a hostname to an IP address. The DNS
servers list is configured by providing an IP address for each DNS name server, and server
precedence is determined by the order in which the servers are added to this list. A default
domain name can be configured, which defines the domain to use when performing a
lookup on an unqualified hostname. Static hostname-to-address mappings can be added
and removed from the local cache.
The DNS client supports 128 entries in the DNS cache. Any application component
requiring a DNS lookup may request services from the DNS client. When the DNS client
is administratively disabled the local cache is purged. Changes to the name server
configuration do not affect the cache. If a stacking switchover occurs, the new Master unit
begins with a cleared cache.
The following applications support domain name in addition to the IP address format:
Radius
DHCP Relay
SNTP
SNMP
TFTP
SYSLOG
Ping
UDP Relay
Port and System Setup Commands
v1.0, February 2007
4-25