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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 Cisco Fast
     EtherChannel protocol.  Upon creation, node creates a network interface
     associated with it.  Interfaces are named “fec0”, “fec1”, etc.  New node
     takes first available unit.

HOOKS

     The fec node accepts any hooks.  However it does not use them.  Under
     normal operation, 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.  Target interface name is
             passed as a string argument.

     NGM_FEC_DEL_IFACE (“del_iface”)
             Remove interface from the trunk.  Target interface name is passed
             as a string argument.

     The following control messages define forwarding method for a node:

     NGM_FEC_MODE_INET (“set_mode_mac”)
             Forwarding decisions will be made on destination link layer MAC
             addresses.

     NGM_FEC_MODE_MAC (“set_mode_inet”)
             Forwarding decisions will be made on destination IP addresses.

SHUTDOWN

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

EXAMPLES

     This example script creates a fec node, attaches four Ethernet interfaces
     to it and sets forwarding method based on IP address:

           /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.