To use the z/VM TCP/IP Dispatcher trace facility, start it with the command CBDIODSP TRACE START. Trace filename, filetype, and location (minidisk or SFS directory) are specified by defining the names CBDTRANT (name and type) and CBDTRAMD (minidisk or directory) in the CBDCONF NAMES file on your A-disk. For more information about the z/VM HCD TCP/IP dispatcher for HCM trace see the following section z/VM HCD TCP/IP Dispatcher for HCM commands.