Additional TCP/IP considerations

Use NETSTAT, STRTCP, and STRHOSTSVR to verify and start TCP/IP functions.

Verify that TCP/IP is started with the following command:

   NETSTAT *CNN

Note: To verify that TCP/IP is started with iSeries™ Navigator, you must already have configured your server with TCP/IP , then do the following:

In iSeries Navigator, select your server > Network.
Right-click TCP/IP Configuration, and select Utilities.
Select Ping.
Specify a host name or TCP/IP address, and click Ping Now.

Use the command STRTCP to start the desired protocol if it is not running.

Verify the necessary daemons are running by browsing the information returned from the NETSTAT *CNN command:

   Remote           Remote     Local
   Address          Port       Port       Idle Time  State
   *                *          as-cent >  000:09:31  Listen
   *                *          as-signon  000:09:41  Listen
   *                *          as-svrmap  002:57:45  Listen
   *                *          as-data >  002:57:45  Listen

Use the command STRHOSTSVR SERVER(*ALL) to start them if necessary.

Verify QZDASRVSD, the ODBC socket daemon, is running in the QSERVER subsystem.
- as-database should be in the Listen State
- WRKJOB QZDASRVSD should be used to check the job log of the daemon for any error messages.
Verify that socket daemon QZSOSMAPD is running in QSYSWRK subsystem.
- as-svrmap should be in the Listen State as shown by NETSTAT *CNN.
- WRKJOB QZSOSMAPD should be used to check the job log of the daemon for any error messages.

The PC locates the socket used by the database server by connecting to the server mapper socket. It retrieves the socket used by as-database. It then connects to the proper socket which is being monitored by the database server daemon, QZDASRVSD. The server daemon will attach the client's connection to a QZDASOINIT prestart job in QUSRWRK. If this is the first connection made to the server from this PC, then two other servers are used: Central server for licensing and signon server for userid/password validation.

For more information about verifying that TCP/IP is started, see General TCP/IP problems.