MirBSD manpage: ippp(4)

IPPP(4)                    BSD Programmer's Manual                     IPPP(4)


     ippp - ISDN synchronous PPP network driver


     pseudo-device ippp count


     The ippp driver interfaces the IP subsystem of the operating system with
     the ISDN layer so that a transport of IP packets over an ISDN link is

     For configuration of the ippp driver, either the ipppctl(8) utility is
     used or it is configured via isdnd(8) and its associated isdnd.rc(5)

     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(8) with the ippp interfaces.

     The ipppctl(8) utility is used to configure all aspects of PPP required
     to connect to a remote site.


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

     link0  Wait passively for connection. The administrative Open event to
            the Link Control Protocol (LCP) layer will be delayed until after
            the lower layers signal an Up event (rise of "carrier"). This can
            be used by lower layers to support a dial-in connection where the
            physical layer isn't available immediately at startup, but only
            after some external event arrives. Receipt of a Down event from
            the lower layer will not take the interface completely down in
            this case.

     link1  Dial-on-demand mode. The administrative Open event to the LCP
            layer will be delayed until either an outbound network packet ar-
            rives, or until the lower layer signals an Up event, indicating an
            inbound connection. As with passive mode, receipt of a Down event
            (loss of carrier) will not automatically take the interface down,
            thus it remains available for further connections.

     The link0 flag is set to off by default, the link1 flag to on.


     bpf(4), isdnd.rc(5), ipppctl(8), isdnd(8), tcpdump(8)


     The ippp device driver was written by Joerg Wunsch <joerg@freebsd.org>
     and then added to ISDN4BSD by
     Gary Jennejohn <gary@freebsd.org>.

     This man page was written by
     Hellmuth Michaelis <hm@kts.org>.

MirBSD #10-current             August 31, 2000                               1

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