Configuring TCP/IP Software for the PC

Restriction: This topic applies to Windows environments only.

Use the following procedure to configure the TCP/IP software for XDB Link. Use your values from the TCP Host/Service worksheet to complete these steps.

To configure TCP/IP perform the following steps:

Install a TCP/IP protocol. If a TCP/IP protocol is already installed (for example, Microsoft TCP/IP), ensure that it is enabled.

Make a backup copy of the HOSTS and SERVICES files (under Windows 95, these files are called HOSTS.SAM and SERVICES.SAM).

If you a running under...	Look for these files in...
Windows NT	C:\`WinNT`\SYSTEM32\DRIVERS\ETC
Windows 95 or 98	C:\WINDOWS

Add the following line to the HOSTS file:
```
IPAddress IPName
```
where:
- IPAddress specifies the TCP/IP address of the host system. Use the value in J1 of the TCP Host/Service worksheet.
- IPName is a name that you assign to this address. Type IPName in uppercase letters. Lowercase characters will cause problems under certain circumstances. Use the value in J2 of the TCP Host/Service Worksheet.
For example: 204.17.148.230 LUDB2

Note:
If this is the last line in the HOSTS file, type a carriage return at the end of the line.
Edit the SERVICES file by adding the following line:
```
ServiceName Port/tcp
```
where:

ServiceName specifies a name that represents the port number on the host system. (You will use this name when you configure XDB Link in a later step.) Type the ServiceName in uppercase letters. Lowercase characters will cause problems under certain circumstances.

Port specifies the dedicated TCP/IP port assigned to the XDB Link Host Option on the host system. Use the value in J4 of the TCP Host/Service worksheet.

For example:
```
XDBSRV 5170/tcp
```
Note:
If this is the last line in the SERVICES file, type a carriage return at the end of the line.

When connecting to DB2 with native TCP/IP:

Choose DRDA(TCP/IP) as your Connection Type
The Remote Host entry should match the mainframe's IP address entry in your HOSTS file.
The port entry should match the DB2 port entry in your SERVICES file. IBM's default port is 446/tcp but users should check with their administrators to find out what port their DB2 listens on.