pob-fec(1) [debian man page]

POB-FEC(1)							   User Command 							POB-FEC(1)

NAME

       pob-fec - receive FEC MP3 streams

SYNOPSIS

       pob-fec [ -s address ] [ -p port ] [ -b size ] [ -q ]

DESCRIPTION

       pob-fec	receives  a  FEC MP3 stream using a custom protocol. The streamed MP3 frames are first decomposed in autonomous data units (ADUs).
       These ADUs are grouped into ADU groups, which are encoded redundantly using a FEC method by Luigi Rizzo. For example, a group if 8 ADUs can
       be  encoded  into  16  packets.	Any  8 received packets of these 16 packets is sufficient to recover the original 8 ADUs. The incoming MP3
       stream is decoded, buffered and written to stdout.

OPTIONS

       -s address
	      Specify the address to listen to (default 224.0.1.23). If the address is a multicast address, group membership is requested automat-
	      ically.

       -p port
	      Specify the port to listen to.

       -b size
	      Specify the number of ADU groups that are hold in the buffer (default 16).

       -q     Don't output any information on standard error.

EXAMPLES

       pob-fec -s 224.0.1.24 -p 8989 | mpg123 -
	      Receive the MP3 FEC stream sent to 224.0.1.24 on port 8989 and feed it into the MP3 decoder mpg123.

AUTHORS

       Manuel Odendahl <manuel@bl0rg.net>, Florian Wesch <dividuum@bl0rg.net>

								   February 2005							POB-FEC(1)

NG_FEC(4)                                                  BSD Kernel Interfaces Manual                                                  NG_FEC(4)

NAME

     ng_fec -- netgraph Fast EtherChannel node

SYNOPSIS

     #include <netgraph/ng_fec.h>

DESCRIPTION

     The fec node implements Ethernet port trunking using the ``Cisco Fast EtherChannel'' protocol.  Upon creation, a fec node creates a network
     interface associated with it.  Interfaces are named ``fec0'', ``fec1'', etc.  New nodes take the first available unit.

HOOKS

     The fec node accepts any hooks.  However it does not use them.  Under normal operation, a fec node should not have any hooks.

CONTROL MESSAGES

     Interface membership in the FEC group is configured with the following control messages:

     NGM_FEC_ADD_IFACE (``add_iface'')
             Attach interface to the FEC group.  The target interface name is passed as a string argument.

     NGM_FEC_DEL_IFACE (``del_iface'')
             Remove interface from the trunk.  The target interface name is passed as a string argument.

     The following control messages define the forwarding method for a node:

     NGM_FEC_SET_MODE_MAC (``set_mode_mac'')
             Forwarding decisions will be based on the link-layer MAC address of the destination.

     NGM_FEC_SET_MODE_INET (``set_mode_inet'')
             Forwarding decisions will be based on the IP address of the destination.

SHUTDOWN

     This node shuts down upon receipt of a NGM_SHUTDOWN control message.

EXAMPLES

     The following example script creates an fec node, attaches four Ethernet interfaces to it and sets the forwarding method to be IP-address
     based:

           /usr/sbin/ngctl -f- << SEQ
                   mkpeer fec dummy fec
                   msg fec0: add_iface "dc0"
                   msg fec0: add_iface "dc1"
                   msg fec0: add_iface "dc2"
                   msg fec0: add_iface "dc3"
                   msg fec0: set_mode_inet
           SEQ

SEE ALSO

     netgraph(4)

HISTORY

     The fec node type was implemented in FreeBSD 5.0.

AUTHORS

     The fec node was written by Bill Paul <wpaul@FreeBSD.org>.  This manual page was written by Gleb Smirnoff <glebius@FreeBSD.org>.

BSD                                                                July 22, 2004                                                               BSD