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Date:      Sat, 7 Apr 2001 09:14:17 +0200 (MEST)
From:      Martin Husemann <martin@duskware.de>
To:        freebsd-isdn@freebsd.org
Subject:   PPP encapsulation
Message-ID:  <200104070715.f377FWG04663@night-porter.duskware.de>

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Hi!

For reasons completely unrelated to ISDN I'm currently modifying if_spppsubr.c
to optionally work without adding/expeccting serial encapsulation 
(PPP in HDLC-like Framing, RFC 1662).

While there, I wondered if this framing is usefull for transmitting PPP over
ISDN, and answered myself "not at all".

Is there any standard requiring this framing? Do implemenations typically
(a) require it and/or (b) use it (besides being tolerant and allowing us
to use and require it - it's easily detectable automatically)?

What would happen if I'd change the isp driver to not use serial framing?

Any hints?


Martin

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