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NG_RFC1490(4)		 BSD Kernel Interfaces Manual		 NG_RFC1490(4)

NAME
     ng_rfc1490 — RFC 1490 netgraph node type

SYNOPSIS
     #include <netgraph/rfc1490/ng_rfc1490.h>

DESCRIPTION
     The rfc1490 node type performs protocol encapsulation, de-encapsulation,
     and multiplexing according to RFC 1490 (which has since been updated by
     RFC 2427).	 This particular type of encapsulation is often used on top of
     frame relay DLCI channels.

     The downstream hook is used to transmit and receive encapsulated frames.
     On the other side of the node, the inet and ppp hooks are used to trans‐
     mit and receive raw IP frames and PPP frames, respectively. PPP frames
     are transmitted and received according to RFC 1973; in particular, frames
     appearing on the ppp hook begin with the PPP protocol number.

     Typically the inet hook is connected to the inet hook of an ng_iface(4)
     node.

HOOKS
     This node type supports the following hooks:

     downstream	  Connects to the RFC 1490 peer entity.

     inet	  Transmits and receives raw IP frames.

     ppp	  Transmits and receives PPP frames.

CONTROL MESSAGES
     This node type only 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_frame_relay(4), ng_iface(4), ngctl(8)

     C. Brown and A. Malis, Multiprotocol Interconnect over Frame Relay, RFC
     2427.

     W. Simpson, PPP in Frame Relay, RFC 1973.

HISTORY
     The ng_rfc1490 node type was implemented in FreeBSD 4.0.

AUTHORS
     Julian Elischer ⟨julian@FreeBSD.org⟩

BUGS
     Not all of RFC 1490 is implemented.

BSD			       January 19, 1999				   BSD

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