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⟩