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.\"
.IX Title "UDPBSO 1"
.TH UDPBSO 1 "2016-07-07" "perl v5.24.1" "BSSP executables"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
udpbso \- UDP\-based best\-effort link service output task for BSSP
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBudpbso\fR {\fIremote_engine_hostname\fR | @}[:\fIremote_port_nbr\fR] \fItxbps\fR \fIremote_engine_nbr\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBudpbso\fR is a background \*(L"daemon\*(R" task that extracts \s-1BSSP\s0 segments from the
queue of segments bound for the indicated remote \s-1BSSP\s0 engine, encapsulates
them in \s-1UDP\s0 datagrams, and sends those datagrams to the indicated \s-1UDP\s0 port
on the indicated host.  If not specified, port number defaults to 6001.
.PP
\&\s-1UDP\s0 congestion can be controlled by setting udpbso's rate of \s-1UDP\s0 datagram
transmission \fItxbps\fR (transmission rate in bits per second) to the value
that is supported by the underlying network.
.PP
Each \*(L"span\*(R" of \s-1BSSP\s0 data interchange between the local \s-1BSSP\s0 engine and a
neighboring \s-1BSSP\s0 engine requires its own best-effort and reliable link service
output tasks. All link service output tasks are spawned automatically by
\&\fBbsspadmin\fR in response to the 's' command that starts operation of the
\&\s-1BSSP\s0 protocol, and they are all terminated by \fBbsspadmin\fR in response to an
\&'x' (\s-1STOP\s0) command.
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
.ie n .IP """0""" 4
.el .IP "``0''" 4
.IX Item "0"
\&\fBudpbso\fR terminated normally, for reasons noted in the \fBion.log\fR file.  If
this termination was not commanded, investigate and solve the problem identified
in the log file and use \fBbsspadmin\fR to restart \fBudpbso\fR.
.ie n .IP """1""" 4
.el .IP "``1''" 4
.IX Item "1"
\&\fBudpbso\fR terminated abnormally, for reasons noted in the \fBion.log\fR file.
Investigate and solve the problem identified in the log file, then use
\&\fBbsspadmin\fR to restart \fBudpbso\fR.
.SH "FILES"
.IX Header "FILES"
No configuration files are needed.
.SH "ENVIRONMENT"
.IX Header "ENVIRONMENT"
No environment variables apply.
.SH "DIAGNOSTICS"
.IX Header "DIAGNOSTICS"
The following diagnostics may be issued to the \fBion.log\fR log file:
.IP "udpbso can't initialize \s-1BSSP.\s0" 4
.IX Item "udpbso can't initialize BSSP."
\&\fBbsspadmin\fR has not yet initialized \s-1BSSP\s0 protocol operations.
.IP "No such engine in database." 4
.IX Item "No such engine in database."
\&\fIremote_engine_nbr\fR is invalid, or the applicable span has not yet
been added to the \s-1BSSP\s0 database by \fBbsspadmin\fR.
.IP "BE-BSO task is already started for this engine." 4
.IX Item "BE-BSO task is already started for this engine."
Redundant initiation of \fBudpbso\fR.
.IP "BE-BSO can't open \s-1UDP\s0 socket" 4
.IX Item "BE-BSO can't open UDP socket"
Operating system error.  Check errtext, correct problem, and restart \fBudpbso\fR.
.IP "BE-BSO can't bind \s-1UDP\s0 socket" 4
.IX Item "BE-BSO can't bind UDP socket"
Operating system error.  Check errtext, correct problem, and restart \fBudpbso\fR.
.IP "Segment is too big for \s-1UDP BSO.\s0" 4
.IX Item "Segment is too big for UDP BSO."
Configuration error: segments that are too large for \s-1UDP\s0 transmission (i.e.,
larger than 65535 bytes) are being enqueued for \fBudpbso\fR.  Use \fBbsspadmin\fR
to change maximum segment size for this span.
.SH "BUGS"
.IX Header "BUGS"
Report bugs to <ion\-bugs@korgano.eecs.ohiou.edu>
.SH "SEE ABSO"
.IX Header "SEE ABSO"
\&\fIbsspadmin\fR\|(1), \fItcpbso\fR\|(1), \fIudpbsi\fR\|(1)