TCPIP$UCP_HELP.HLB  —  LOOP
    Sends ICMP ECHO packets to hosts to determine whether they are
    active. Same as the PING command.

    Format

      LOOP  [ host ]

            [ /ADDRESS=xx.xx.xx.xx ]

            [ /ALL ]

            [ /FULL ]

            [ /NUMBER_PACKETS=n ]

            [ /PACKET_SIZE=n ]

            [ /PATTERN="hexadecimal-string" ]

            [ /[NO]ROUTE ]

            [ /WAIT=n ]

1  –  Parameters 

 host

    Optional. Default: None.

    Specifies the host to which the test packets are sent. Omitting
    the host parameter and the /ADDRESS qualifier tests the TCP/IP
    Services software on the local node, as defined by the system
    logical TCPIP$INET_HOST.

2  –  Qualifiers

2.1    /ADDRESS 

       /ADDRESS=xx.xx.xx.xx

    Optional.

    Specifies the IP address of the host to which the test packets
    are sent.

2.2    /ALL 

    Optional. Default: Not all requests.

    Displays all ICMP ECHO_REQUESTs, even if not in direct response
    to this operation.

2.3    /FULL 

    Optional.

    Numeric output only. No attempt is made to look up symbolic names
    for host addresses. This occurs only when displaying ICMP packets
    other than ECHO_RESPONSE.

2.4    /NUMBER_PACKETS 

       /NUMBER_PACKETS=n

    Optional. Default: 4 packets

    Specifies the number of packets to send. If you specify 0,
    packets are sent continuously until you terminate the LOOP
    command with Ctrl/C.

2.5    /PACKET_SIZE 

       /PACKET_SIZE=n

    Optional. Default: 64 bytes.

    Specifies the size of the ICMP ECHO_REQUEST.

2.6    /PATTERN 

       /PATTERN=hexadecimal-string

    Optional.

    Fills out the packet you send with up to 16 bytes, which is
    useful for diagnosing data-dependent problems. The hexadecimal-
    string is a string of hexadecimal digits of up to 32 characters
    (16 bytes).

    For example, /PATTERN="ff" causes the sent packet to be filled
    with ones (1).

2.7    /ROUTE 

       /ROUTE
       /NOROUTE

    Optional. Default: /ROUTE.

    /ROUTE     Request is routed through the normal routing tables.

    /NOROUTE   Normal routing tables are bypassed.
               If the host is not on the LAN, you get an error.

2.8    /WAIT 

       /WAIT=n

    Optional.

    Specifies the number of seconds to wait between sending packets.

3  –  Examples 

    1.TCPIP> LOOP thrush

      Tests the connectivity path to UNIX host thrush.

    2.TCPIP> LOOP

      Tests the local TCP/IP Services software.

    3.TCPIP> LOOP /NOROUTE thrush

      Tests the path to the UNIX host thrush without using normal
      routing tables.
Close Help