---
name: "ng_atmllc"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/ng_atmllc"
---

# ng\_atmllc(4)

ATM LLC netgraph node type

## 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)](/ng_atm/4.md) 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)](/ng_eiface/4.md) 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)](/netgraph/4.md), [ng\_atm(4)](/ng_atm/4.md), [ng\_eiface(4)](/ng_eiface/4.md), [ngctl(8)](/ngctl/8.md) J. Heinanen, *Multiprotocol Encapsulation over ATM Adaptation Layer 5*, RFC 1483.

## AUTHORS

Benno Rice ⟨benno@FreeBSD.org⟩