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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〉.