Verify and troubleshoot TSO Client connectivity

Make sure the distributed system where the TSO Client server is executing is properly identified and the TCP/IP configuration supports the hostname specified. The TCP/IP configuration must support the resolution of the hostname in both directions: system name to IP address and IP address to system name.

Before you begin

Previous step: Configuring the TSO Client environment

Procedure

To verify the TSO Client environment definition, do these steps:

To verify that you have the correct hostname identified in the HOST parameter in the environment definition file, issue the following command from a command prompt on a different distributed system (other than the system where the TSO Client server is executing):
```
nslookup hostname
```
In this command, hostname is the value specified for the HOST parameter in the environment definition file.
If the connection is verified from another distributed system, then verify the connection from the z/OS® system by issuing the following command from ISPF:
```
TSO NSLOOKUP hostname
```
In this command, hostname is the value specified for the HOST parameter in the environment definition file.

Results

If these commands return information about the TSO Client server, then communication is working properly. If it is not working, you need to review the problem further by doing one of the following actions:

Set up the z/OS system to communicate with the DNS server as described in the z/OS Communications Server IP Configuration Reference, NSINTERADDR statement.
Add the distributed host name to the local host table as described in the z/OS Communications Server IP Configuration Guide, MAKESITE command.

What to do next

Next step: Starting and stopping the server and client components of TSO Client