Enabling The Dns Resolver - Alcatel-Lucent OmniSwitch AOS Release 6 Manual

Enabling the DNS Resolver

Enabling the DNS Resolver
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.
Note. 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
-> ip domain-name mycompany1.com
2
Use the ip domain-lookup
-> ip domain-lookup
You can disable the DNS resolver by using the
refer to the OmniSwitch CLI Reference Guide.
3
Specify the IP addresses of up to three servers with the
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
-> ip domain-name mycompany1.com
2
Use the ip domain-lookup
-> 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
IPv6 servers will be queried when a host lookup is requested.
-> ipv6 name-server fe2d::2c
Note. You cannot use multicast, loopback, link-local and unspecified IPv6 addresses for specifying IPv6
DNS servers.
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CLI command to enable the DNS resolver service.
no ip domain-lookup
CLI command to enable the IPv6 DNS resolver service.
f302::3de1:1 f1bc::202:fd40:f3
OmniSwitch AOS Release 6 Switch Management Guide
ip domain-name CLI command.
command. For more information,
ip name-server CLI command. These servers
ip domain-name CLI command.
ip domain-lookup
ipv6 name-server CLI command. These
Logging Into the Switch
command. For
July 2010