Compatibility considerations

This topic describes considerations when you are moving from an earlier release of IBM® i to the most current release, or you are moving from an earlier HTTP Server version of IBM HTTP Server for i to a newer version.

You should read about any compatibility issues by reading HTTP Server compatibility information Link outside Information Center on the HTTP Server home page. Before reading the information, you will need to determine the HTTP Server version you are currently using. Use one of the following methods to determine the HTTP Server version:

Use the "-V" option on the Start TCP/IP Server (STRTCPSVR) command. For example, if HTTP Server (Apache 2.4.20) is installed, STRTCPSVR SERVER(*HTTP) HTTPSVR(APACHEDFT '-V') displays:
```
Server version: Apache/2.4.20 (IBM i)
Server built:   Oct  7 2016 11:10:46
```
From the IBM Web Administration for i, select Manage an HTTP server. In the server introduction, the Apache version level is included in the header. For example:
```
Manage Apache server "WEBSERVER" - Apache/2.4.20
```