ng_atmllc(4)

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 ap

propriate.
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 con

nected 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>

BSD March 8, 2004

BSD