NAME

       udpbso - UDP-based best-effort link service output task for BSSP

SYNOPSIS

       udpbso {remote_engine_hostname | @}[:remote_port_nbr] txbps remote_engine_nbr

DESCRIPTION

       udpbso is a background "daemon" task that extracts BSSP segments from the queue of
       segments bound for the indicated remote BSSP engine, encapsulates them in UDP datagrams,
       and sends those datagrams to the indicated UDP port on the indicated host.  If not
       specified, port number defaults to 6001.

       UDP congestion can be controlled by setting udpbso's rate of UDP datagram transmission
       txbps (transmission rate in bits per second) to the value that is supported by the
       underlying network.

       Each "span" of BSSP data interchange between the local BSSP engine and a neighboring BSSP
       engine requires its own best-effort and reliable link service output tasks. All link
       service output tasks are spawned automatically by bsspadmin in response to the 's' command
       that starts operation of the BSSP protocol, and they are all terminated by bsspadmin in
       response to an 'x' (STOP) command.

EXIT STATUS

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

       "1" udpbso terminated abnormally, for reasons noted in the ion.log file.  Investigate and
           solve the problem identified in the log file, then use bsspadmin to restart udpbso.

FILES

       No configuration files are needed.

ENVIRONMENT

       No environment variables apply.

DIAGNOSTICS

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

       udpbso can't initialize BSSP.
           bsspadmin has not yet initialized BSSP protocol operations.

       No such engine in database.
           remote_engine_nbr is invalid, or the applicable span has not yet been added to the
           BSSP database by bsspadmin.

       BE-BSO task is already started for this engine.
           Redundant initiation of udpbso.

       BE-BSO can't open UDP socket
           Operating system error.  Check errtext, correct problem, and restart udpbso.

       BE-BSO can't bind UDP socket
           Operating system error.  Check errtext, correct problem, and restart udpbso.

       Segment is too big for UDP BSO.
           Configuration error: segments that are too large for UDP transmission (i.e., larger
           than 65535 bytes) are being enqueued for udpbso.  Use bsspadmin to change maximum
           segment size for this span.

BUGS

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

SEE ABSO

       bsspadmin(1), tcpbso(1), udpbsi(1)