TOP(F)                                     UNIX System V



     Name
          top, top.next - the Micnet topology files


     Description
          These files contain the topology information  for  a  Micnet
          network.    The   topology  information  describes  how  the
          individual systems in the network are  connected,  and  what
          path  a  message must take from one system to reach another.
          Each file contains one or more lines of text.  Each line  of
          text defines a connection or a communication path.

          The top file defines connections between systems.  Each line
          lists the machine names of the connected systems, the serial
          lines used to make the connection, and the speed (baud rate)
          of  transmission  between  the  systems.   Each line has the
          following format:

               machine1 tty1a machine2 tty2a speed

          machine1  and  machine2a  are  the  machine  names  of   the
          respective  systems  (as  given  in the systemid files). The
          ttys are the device names (e.g., tty1a)  of  the  connecting
          serial  lines.   The  speed  must be an acceptable baud rate
          (e.g., 110, 300, ..., 19200).

          The top.next file contains information about how to reach  a
          particular system from a given system.  There may be several
          lines for each system in the network.  Each line  lists  the
          machine  name of a system, followed by the machine name of a
          system connected to it, followed by the machine names of all
          the  systems that may be reached by going through the second
          system.  Such a line has the form:

               machine1 machine2 machine3 [machine4]...

          The machine names  must  be  the  names  of  the  respective
          systems  (as given by the first machine name in the systemid
          files).

          The top.next file must be present even if there are only two
          computers  in the network.  In such a case, the file must be
          empty.

          In the top and top.next files, any  line  beginning  with  a
          number sign (#) is considered a comment, and is ignored.

     Files
          /usr/lib/mail/top

          /usr/lib/mail/top.next


     See Also
          netutil(ADM), systemid(F)


     (printed 8/23/89)                                  TOP(F)