xenial (1) imcfw.1.gz

Provided by: ion_3.2.1+dfsg-1_amd64 bug

NAME

       imcfw - bundle route computation task for the IMC scheme

SYNOPSIS

       imcfw

DESCRIPTION

       imcfw is a background "daemon" task that pops bundles from the queue of bundle destined for IMC-scheme
       (Interplanetary Multicast) endpoints, determines which "relatives" on the IMC multicast tree to forward
       the bundles to, and appends those bundles to the appropriate queues of bundles pending transmission to
       those proximate destinations.

       For each possible proximate destination (that is, neighboring node) there is a separate queue for each
       possible level of bundle priority: 0, 1, 2.  Each outbound bundle is appended to the queue matching the
       bundle's designated priority.

       Proximate destination computation is determined by multicast group membership as resulting from nodes'
       registration in multicast endpoints, governed by multicast tree structure as configured by imcadmin(1).

       imcfw is spawned automatically by bpadmin in response to the 's' (START) command that starts operation of
       Bundle Protocol on the local ION node, and it is terminated by bpadmin in response to an 'x' (STOP)
       command.  imcfw can also be spawned and terminated in response to START and STOP commands that pertain
       specifically to the IMC scheme.

EXIT STATUS

       "0" imcfw terminated, for reasons noted in the ion.log log file.  If this termination was not commanded,
           investigate and solve the problem identified in the log file and use bpadmin to restart imcfw.

       "1" imcfw could not commence operations, for reasons noted in the ion.log log file.  Investigate and
           solve the problem identified in the log file, then use bpadmin to restart imcfw.

FILES

       No configuration files are needed.

ENVIRONMENT

       No environment variables apply.

DIAGNOSTICS

       The following diagnostics may be issued to the ion.log log file:

       imcfw can't attach to BP.
           bpadmin has not yet initialized BP operations.

       imcfw can't load routing database.
           ipnadmin has not yet initialized the IPN scheme.

       Can't create lists for route computation.
           An unrecoverable database error was encountered.  imcfw terminates.

       'imc' scheme is unknown.
           The IMC scheme was not added when bpadmin initialized BP operations.  Use bpadmin to add and start
           the scheme.

       Can't take forwarder semaphore.
           ION system error.  imcfw terminates.

       Can't exclude sender from routes.
           An unrecoverable database error was encountered.  imcfw terminates.

       Can't enqueue bundle.
           An unrecoverable database error was encountered.  imcfw terminates.

BUGS

       Report bugs to <ion-bugs@korgano.eecs.ohiou.edu>

SEE ALSO

       bpadmin(1), imcadmin(1), bprc(5), imcrc(5)