NAME

     ng_atmllc — ATM LLC netgraph node type

SYNOPSIS

     #include <netgraph/ng_atmllc.h>

DESCRIPTION

     The atmllc node type translates frames in to and out of ATM LLC encapsulation, as specified
     by RFC 1483.  In LLC encapsulation the protocol of a given protocol data unit (PDU) is
     specified by an IEEE 802.2 LLC header, possibly followed by an IEEE 802.1a SubNetwork
     Attachment Point (SNAP) header.  This node currently handles the Ethernet and FDDI
     protocols.

     The node transmits and receives ATM PDUs on the atm hook.  Received PDUs are decoded and
     forwarded to the ether or fddi hooks as appropriate.  Data received on the ether or fddi
     hooks are assumed to be full Ethernet or FDDI packets as appropriate and are encapsulated
     into a PDU and transmitted via the atm hook.

HOOKS

     This node type supports the following hooks:

     atm    ATM connection.  Typically, this hook would be connected to a ng_atm(4) node, which
            handles transmission of ATM PDUs over an ATM device.

     ether  Ethernet connection.  This hook sends and receives Ethernet frames.  This would
            normally be connected to an ng_eiface(4) node if in use.

     fddi   FDDI connection.  This hook sends and receives FDDI frames.

CONTROL MESSAGES

     This node type supports the generic control messages.

SHUTDOWN

     This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have
     been disconnected.

SEE ALSO

     netgraph(4), ng_atm(4), ng_eiface(4), ngctl(8)

     J. Heinanen, Multiprotocol Encapsulation over ATM Adaptation Layer 5, RFC 1483.

AUTHORS

     Benno Rice <benno@FreeBSD.org>