Alcatel-Lucent 6850-48 補足マニュアル

Logging Into the Switch

Enabling the DNS Resolver

OmniSwitch AOS Release 6 Switch Management Guide

page 2-23

A Domain Name System (DNS) resolver is an optional internet service that translates host names into IP 
addresses. Every time you enter a host name when logging into the switch, a DNS service must look up 
the name on a server and resolve the name to an IP address. You can configure up to three IPv4 domain 
name servers and three IPv6 domain name servers that will be queried in turn to resolve the host name. If 
all servers are queried and none can resolve the host name to an IP address, the DNS fails. If the DNS 
fails, you must either enter an IP or IPv6 address in place of the host name or specify the necessary lookup 
tables on one of the specified servers.

. 

You do not need to enable the DNS resolver service unless you want to communicate with the 

switch by using a host name. If you use an IP or IPv6 address rather than a host name, the DNS resolver 
service is not needed.

You must perform three steps on the switch to enable the DNS resolver service.

1 Set the default domain name for DNS lookups with the 

 CLI command.

-> ip domain-name mycompany1.com

2 Use the 

 CLI command to enable the DNS resolver service. 

-> ip domain-lookup

You can disable the DNS resolver by using the 

 command. For more information, 

refer to the OmniSwitch CLI Reference Guide.

3 Specify the IP addresses of up to three servers with the 

 CLI command. These servers 

will be queried when a host lookup is requested.

-> ip name-server 189.202.191.14 189.202.191.15 189.255.19.1

You can also specify IPv6 DNS servers to query on a host lookup. The following example describes the 
steps to enable the IPv6 DNS resolver service on the switch. 

1 Set the default domain name for IPv6 DNS lookups with the

 

CLI command.

-> ip domain-name mycompany1.com

2 Use the 

CLI command to enable the IPv6 DNS resolver service. 

-> ip domain-lookup

You can disable the IPv6 DNS resolver by using the no form of the 

more information, refer to the OmniSwitch CLI Reference Guide.

3 Specify the IPv6 addresses of up to three servers with the 

 

CLI command. These 

IPv6 servers will be queried when a host lookup is requested.

-> ipv6 name-server fe2d::2c  f302::3de1:1 f1bc::202:fd40:f3

Note. You cannot use multicast, loopback, link-local and unspecified IPv6 addresses for specifying IPv6 
DNS servers.