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26 .\" $Id: irip.4,v 1.3 2006/07/08 20:51:35 tsutsui Exp $
30 .\" last edit-date: [Mon Dec 13 23:10:25 1999]
37 .Nd Raw IP over ISDN network driver
39 .Cd "pseudo-device irip" Ar count
43 driver interfaces the IP subsystem of the operating system with the
44 ISDN layer so that transport of IP packets over an ISDN link
47 The driver just packs IP packets without anything appended or prepended
48 into raw HDLC packets on the B channel and transfers them to a remote site.
49 IP packets received from the remote site are queued into the local IP
52 The format of the resulting packet on the B channel is:
54 .Dl (HDLC opening flag) (IP-packet) (CRC) (HDLC closing flag)
56 In the case where an IP packet for a remote site arrives in the driver and no
57 connection has been established yet, the driver communicates with the
59 daemon to establish a connection.
61 The driver has support for interfacing to the
69 The driver optionally (when compiled with the IRIP_VJ option) provides Van
70 Jacobson header compression, under control of the link0 and link1 options to
73 .Bl -tag -width 15n -offset indent -compact
75 Apply VJ compression to outgoing packets on this interface, and assume that
76 incoming packets require decompression.
78 Check incoming packets for Van Jacobson compression; if they appear to be
79 compressed, automatically set link0.
82 The default values are
98 device driver and this man page were written by
99 .An Hellmuth Michaelis Aq hm@kts.org .