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⟩