Configuring Domain Name System (DNS) Characteristics

 

 

Mode

When the access server attempts to resolve a host

 

name or address, it searches:

 

 

Stub

Remote data only, using recursive name service. The access

 

server performs no DNS caching.

Slave

Local data and remote data, using recursive name service. The

 

access server performs no DNS caching. When conflicts occur,

 

the local data takes precedence.

 

 

Configuring a List of Commonly Used Internet Hosts

You can optionally enter commonly used Internet host names and addresses in the access server cache.

The following command shows how to do this:

Local> CHANGE INTERNET HOST SALES ADDRESS 195.1.1.72

Two additional commands enable you to manage the list of commonly used Internet hosts:

∙SHOW/LIST/MONITOR INTERNET HOST

∙CLEAR/PURGE INTERNET HOST

If Using a Name Server

If you are using name servers—that is, if NAME RESOLUTION MODE is set to a value other than LOCAL—then you should define local host names and addresses only in exceptional cases. The names received from name servers reflect recent updates. Also, they may include the hosts you are likely to define with CHANGE INTERNET HOST. Undesirable conflicts may result.

Configuring a List of Internet Name Servers

This section describes how to configure a list of Internet local and root name servers that the access server commonly uses.

Configuring a Root Name Server

A root name server is a name server at the top level domain. To enter a root name server, you must provide an absolute domain name. The following example shows how to enter a root name server:

Local> CHANGE INTERNET NAMESERVER C.NYSER.NET ADDRESS 192.33.4.12 ROOT

Configuring a Local Name Server

TCP/IP Network Characteristics 7-13