NAME

       mptcpd - multipath TCP daemon

SYNOPSIS

       mptcpd [-d?V] [-l DEST] [--debug] [--addr-flags=FLAGS] [--notify-flags=FLAGS] [--plugin-dir=DIR]
              [--path-manager=PLUGIN] [--load-plugins=PLUGINS] [--help] [--usage] [--log=DEST] [--version]

DESCRIPTION

       mptcpd is a daemon for Linux based operating systems that performs multipath TCP (see IETF RFC 8684) path
       management  related  operations  in the user space.  It interacts with the Linux kernel through a generic
       netlink connection to track per-connection information, available network interfaces, request  new  MPTCP
       subflows, handle requests for subflows, etc.

OPTIONS

       mptcpd accepts the following command line options:

       -d,--debug
              enable debug log messages

       -?,--help
              display mptcpd help information

       --usage
              display brief mptcpd usage information

       -l DEST, --log=DEST
              log output to DEST, where DEST can be stderr, syslog or journal

       --addr-flags=FLAGS
              set  flags  for announced address, where FLAGS is a comma separated list containing one or more of
              the flags subflow, signal, backup, and fullmesh that plugins that deal  with  the  in-kernel  path
              manager may use when advertising addresses, e.g.  --addr-flags=subflow

       --notify-flags=FLAGS
              address  notification  flags,  where FLAGS is a comma separated list containing one or more of the
              following flags:

              existing
                     notify plugins of the addresses that exist at mptcpd start

              skip_link_local
                     ignore (do not notify) [ipv6] link local address updates

              skip_loopback
                     ignore (do not notify) host (loopback) address updates

              check_route
                     notify address only if a default route is available  from  such  address  and  the  related
                     device.  If  the  route check fails, it will re-done after a little timeout, to allow .e.g.
                     DHCP to configure the host properly. Complex Policy routing configuration  may  confuse  or
                     circumvent this check.

              These  flags determine whether mptpcd plugins will be notified when related addresses are updated,
              e.g.  --notify-flags=existing,skip_link_local,check_route

       --plugin-dir=DIR
              set plugin directory to DIR

       --path-manager=PLUGIN
              set default path manager plugin to PLUGIN, overriding plugin priorities

       --load-plugins=PLUGINS
              set plugins to load on startup, where PLUGINS is a comma separated list  containing  one  or  more
              plugin names

       -V,--version
              display mptcpd version information

FILES

       /etc/mptcpd/mptcpd.conf
              Location of the mptcpd system configuration file.

REPORTING BUGS

       Report bugs to mptcp@lists.linux.dev.

SEE ALSO

       ip-mptcp(8)

Multipath TCP Daemon                               2022-08-19                                          MPTCPD(8)