Defining Domain Names and IP Addresses
This section describes the TCP/IP name resolution function, used
by AnyNet® to map SNA resources to IP addresses. This
function queries both the local HOSTS file and any domain name servers
to convert a domain name (for example, lu1.neta1.sna.ibm.com)
into an IP address (for example, 10.1.1.1).
- HOSTS File
- You can use TCP/IP HOSTS files to define domain names and IP
addresses for your network. However, as your network becomes larger
and maintaining the HOSTS file on each user workstation becomes too
time-consuming, it is recommended that you use a domain name server.
The HOSTS file lists:
- IP address
- Domain name
- Other aliases for the domain name
For example, if your IP address is 10.1.1.1, network ID is NETA1, SNA resource name is LUA1, and SNA domain name suffix is the default (sna.ibm.com), enter the following in your HOSTS file:10.1.1.1 lua1.neta1.sna.ibm.com - Domain Name Server
- Domain names and IP addresses can also be defined in the domain
name server database.
Each SNA identifier is mapped to a corresponding IP address by a domain name server. The location of these servers is configured in the Network section of the Control Panel.
For more information on HOSTS files and domain name servers, refer to your TCP/IP documentation. If your workstation is using the TCP/IP support in Windows 8, Windows 8.1, Windows 10, and Windows Server 2008, refer to the online TCP/IP documentation that is included with the Windows products.