VMS Help  —  TCPTRACE
    Starts the TCPTRACE utility. The TCPTRACE utility lets you trace
    packet flow between the local host and remote hosts. You can
    either monitor all packet flow or use the various qualifiers to
    monitor only those packets of interest.

    Format

      TCPTRACE  host [/BUFFERS=n | /FULL | /OUTPUT |/PACKETS=n |

                /PORT=option | /PROTOCOL=option]

1  –  Parameters 

 host

    Required.

    Remote host to which you are sending packets for tracing.

2  –  Qualifiers

2.1    /BUFFERS 

       /BUFFERS=n

    Optional. Default: 400 for OpenVMS Alpha or I64; 50 for OpenVMS
    VAX.

    Specifies the number of buffers that TCPTRACE allocates for
    temporary storage. If the LKWSETFUL error is returned, the
    process's working set quota is too small to fit the number of
    requested buffers. These buffers must be locked into the process
    working set, so you may have to decrease the number of buffers
    to accommodate the working set size, or increase the number to
    prevent TCPTRACE from dropping packets.

2.2    /FULL 

    Optional. Default: Brief display.

    Displays the packet contents.

2.3    /OUTPUT 

    Optional. Default: Screen display.

    Redirects the trace output to a file. If you specify a file name
    that already exists, TCPTRACE appends new trace information to
    the existing file.

2.4    /PACKETS 

       /PACKETS=n

    Optional. Default: 10.

    Stops the trace after TCPTRACE displays the specified number of
    packets.

2.5    /PORT 

       /PORT ={LOCAL | REMOTE}= n

    Optional. Default: Trace all port numbers.

    Specifies the local or remote port number to trace. Use in
    conjunction with the /PROTOCOL qualifier to filter tracing to
    an exact port and protocol.

2.6    /PROTOCOL 

       /PROTOCOL = {ARP | ICMP | IP | TCP | UDP}

    Optional. Default: IP

    Specifies the protocol to trace. Use in conjunction with the
    /PORT qualifier to filter tracing to an exact port and protocol.

3  –  Examples 

    1.$  TCPTRACE HOST1 /FULL /PORT=REMOTE=21

      Traces packets for host HOST1 and remote port number 21.
      TCPTRACE provides a full display of the packets contents.

    2.$  TCPTRACE HOST2 /FULL /PORT=(LOCAL=23, REMOTE=1056) -

      _$  /PACKETS=30 /OUTPUT=TELNET_TRACE.TXT)

      Traces packets for host HOST2 with a local port of 23 and
      remote port number of 1056. TCPTRACE provides a full display
      of the packets contents. TCPTRACE continues the trace for 30
      packets and writes the output to the file TELNET_TRACE.TXT in
      the current directory.
Close Help