Enabling the DNS Resolver

Logging Into the Switch

 

 

 

 

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 domain name serv- ers 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 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 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.

1Set the default domain name for DNS lookups with the ip domain-nameCLI command.

-> ip domain-name mycompany1.com

2Specify the IP addresses of up to three servers with the ip name-serverCLI 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

3Use the ip domain-lookupCLI command to enable the DNS resolver service.

-> ip domain-lookup

You can disable the DNS resolver by using the no ip domain-lookupcommand. For more information, refer to the OmniSwitch CLI Reference Guide.

Verifying Login Settings

To display information about login sessions, use the following CLI commands.

who

Displays all active login sessions (e.g., console, Telnet, FTP, HTTP,

 

Secure Shell, Secure Shell FTP).

 

 

whoami

Displays the current user session.

 

 

show session config

Displays session configuration information (e.g., default prompt, ban-

 

ner file name, inactivity timer, login timer, login attempts).

 

 

show dns

Displays the current DNS resolver configuration and status

 

 

For more information about these commands, refer to the OmniSwitch CLI Reference Guide.

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Alcatel Carrier Internetworking Solutions omniswitch manual Enabling the DNS Resolver, Verifying Login Settings
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omniswitch specifications

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