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Date:      Wed, 23 Aug 2000 11:47:53 +0800
From:      Eugene Grosbein <eugen@svzserv.kemerovo.su>
To:        "freebsd-stable@FreeBSD.ORG" <freebsd-stable@FreeBSD.ORG>
Subject:   /kernel: ppp0: bad fsc 5d93, pkt len 88
Message-ID:  <39A34969.AB504CFF@svzserv.kemerovo.su>

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Hello!

I have a problem with pppd/FreeBSD 4.1-STABLE.

These is a dial-in(getty+pppd) server. It's FreeBSD 3.5-STABLE.
There is a client box with modem. It's dial-boot box: 
FreeBSD 4.1-STABLE/Windows95 OSR2.

If I make a call from Windows, everything is OK: ppp connection is stable,
http/ftp/telnet - all works.

If I boot 4.1-STABLE and make a call using pppd, strange things happen:
ppp connection seems to be stable, ppp0 interface is up, routing is right.
But no packets from server are received. In server's /etc/ppp/ip-up
I run 'ping' against client box. I see, client's modem receives packets
(RD flashes), but firewall and bpfilter does not see packets.
If I put 'kdebug 1' to client's /etc/ppp/options, for EVERY
incoming packet, client's kernel writes to console:

/kernel: ppp0: bad fsc 5d93, pkt len 88

Numbers differ from packet to packet.

The question is: what's going on, why OSR2<->pppd works, but pppd<->pppd
does not?

Eugene


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