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NG_RFC1490(4)         DragonFly 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.

DragonFly 3.5                  January 19, 1999                  DragonFly 3.5

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