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>