ppp connection unstable

From: Stefan Ehmann (shoesoft_at_gmx.net)
Date: 06/08/03

  • Next message: cartman: "aue driver problem" 
    To: freebsd-net@freebsd.org
Date: 08 Jun 2003 11:54:20 +0200

    I'm running user ppp for my Internet connection. It basically runs fine
    but there is this quite annoying problem:

    Sometimes packets stop going out through the tun0 interface (pppctl
    shows
    queued packets) but there are still packets incoming (obviously the
    connection becomes unusable). The only remedy is to reconnect manually
    (I'm doing this via pppctl)
    or wait until this is done automatically when lqr is enabled.

    When does this happen?
    - many connections at the same time (e.g. running a file-sharing tool)
    - heavy CPU load

    A combination of the two factors usually result in the problem within
    some
    minutes.

    When burning Cd's there's a similar problem. First the bandwidth goes
    down
    really low but pinging is still possible - sometimes i also get
    disconnected. (But I could live with that problem since i don't burn
    CD's
    that often.)

    My configuration:
    I'm using FreeBSD CURRENT (but the same problem appeared using
    4.8-RELEASE)

    ISDN-Card: AVM Fritz!Card PCI (passive)

    excerpt from kernel config
    #AVM Fritz!Card
    device ifpi

    #ISDN Protocol Stack (mandatory)
    device "i4bq921"
    device "i4bq931"
    device "i4b"

    #ISDN Devices
    device "i4btrc" 4
    device "i4bctl"
    device "i4brbch" 4
    #device "i4btel" 2
    #device "i4bipr" 4
    #options IPR_VJ
    #device "i4bisppp" 4

    For ppp configuration I use isdnd.rc and ppp.conf.isdn from
    /usr/share/examples/ppp/ (only telephone numbers and login information
    changed)

    I couldn't find the cause of this problem so far. My best guess would be
    some kind of hardware incompatibility but there should be some remedy
    since
    it runs fine using windows.

    Any help would be appreciated.

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