Transport chain problems
Review the following topics if you encounter a transport chain problem.
TCP transport channel fails to bind to a specific host/port combination
If a TCP transport channel fails to
bind to a specific port, one of the following situations might have
occurred:
- You are trying to bind the channel to a port that is already bound to another application, such as another instance of an application server.
![[z/OS]](../images/ngzos.svg)
You are trying to bind to a port that is in a transitional state waiting for
closure. This socket must transition to closed before you restart the server. The port might be in
TIME_WAIT, FIN_WAIT_2, or CLOSE_WAIT state. Issue the netstat -acommand from a command prompt to display the state of the port to which you are trying to bind.