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I4BISPPP(4)		 BSD Kernel Interfaces Manual		   I4BISPPP(4)

NAME
     i4bisppp -- isdn4bsd synchronous PPP over ISDN B-channel network driver

SYNOPSIS
     device "i4bisppp" [count]
     device sppp

DESCRIPTION
     The i4bisppp driver interfaces the	IP subsystem of	the operating system
     with the isdn4bsd package so that a transport of IP packets over an ISDN
     link is possible.

     The driver	is just	a glue layer between the sppp(4) backend and the
     ISDN4BSD package and needs	the sppp(4) driver configured into the kernel.

     The network interfaces provided by	this driver are	named isp_n_, where
     <n> is a number between 0 and count-1 from	the kernel config line.

     For configuration of the i4bsppp driver, either the spppcontrol(8)	util-
     ity is used or the	driver can be configured via isdnd(1) and its associ-
     ated isdnd.rc(5) file.

     In	case an	IP packet for a	remote side arrives in the driver and no con-
     nection is	established yet, the driver communicates with the isdnd(8)
     daemon to establish a connection.

     The driver	has support for	interfacing to the bpf(4) subsystem for	using
     tcpdump(1)	with the isp interfaces.

LINK0 and LINK1
     The link0 and link1 flags given as	parameters to ifconfig(8) have the
     following meaning for the isp_n_ devices:

     link0  wait passively for connection

     link1  auto-dial on output

     The link0 and link1 flags are set to off by default.

     See sppp(4) for a more detailed discussion	of the flags.

SEE ALSO
     tcpdump(1), bpf(4), sppp(4), isdnd.rc(5), isdnd(8), spppcontrol(8)

AUTHORS
     The i4bisppp device driver	was written by Joerg Wunsch
     <joerg@FreeBSD.org> and then added	to ISDN4BSD by Gary Jennejohn
     <gj@FreeBSD.org>.

     This manpage was written by Hellmuth Michaelis <hm@FreeBSD.org>.

BSD				 July 28, 2002				   BSD

NAME | SYNOPSIS | DESCRIPTION | LINK0 and LINK1 | SEE ALSO | AUTHORS

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