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Date:      	Mon, 14 Aug 1995 23:05:18 -0700 (PDT)
From:      Tom Samplonius <tom@uniserve.com>
To:        FreeBSD-current users <freebsd-current@FreeBSD.org>, Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>
Subject:   Re: ioctl(SIOCAIFADDR): File exists
Message-ID:  <Pine.BSF.3.91.950814230312.5484D-100000@haven.uniserve.com>
In-Reply-To: <199508150519.HAA02562@uriah.heep.sax.de>

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On Tue, 15 Aug 1995, J Wunsch wrote:

> >   Header compression?  Doesn't that mean that it is SLIP or PPP problem 
> > then and not a TCP problem at all?
> 
> It's SLIP, but _only_ for TCP.  That made me suspect T/TCP in the
> first place: ICMP and UDP datagrams passed the SLIP link.  Only TCP
> traffic caused errors at the link layer.

  Classic VJ problem.  VJ only affects mainly TCP headers.  If you connect a 
CSLIP system to a SLIP system the only thing that will work is ICMP and UDP.

> Maybe it was a problem with Auto-VJ, it's not exactly reproducable now
> and seems to be solved.

Tom



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