possible (kernel) bug with zebra

From: Roman Sidnev (sirok_at_mail.ru)
Date: 12/25/03

  • Next message: Rob: "The nice utility: man pages bug?" 
    Date: Fri, 26 Dec 2003 03:58:54 +0500
To: freebsd-stable@freebsd.org

    Hello,

    >I don't know if my machine has some hardware problem, but I've noticed this
    >strange behavior with zebra 0.93b_7 on 4.9-STABLE.
    I think it not hardware problem, i have same problem
    with gre and tun(vtund) interfaces and quagga. Panics occurs sometimes
    when interface state changes (up/down). Sometimes kernel dont panics, but
    zebra (quagga) dies. I don't know any solution. I had the same problem
    with 4.8-STABLE.

    >The first problem is zebra's inconsistent(?) handling of routing information,
    >especialy when it comes to point-to-point interfaces (like tun) and ones
    >handled by ppp(8).
    >When ppp shuts down a link, it first deletes all routes, including the
    >route to the remote host. Then it downs the interface. Zebra gets confused
    >about this, because it gets the RTM_DELETE messages, but not the RTM_DELADDR
    >message it seems to expect. (Which happens if you just do ifconfig -alias,
    >there is a RTM_DELETE and then RTM_DELADDR)
    >As a result, the zebra's routing table becomes bogus and the advertised
    >routes are not correct. To fix this for now, I've put a script to do a
    >ifconfig -alias which is run from ppp.linkdown.
    >So far so good, but the kernel starts to panic :/
    >Attached are the results from two consecutive panics

    >I can provide more information/do more tests if someone finds this
    >interesting :) Any help is appreciated, of course
       

    -- 
Best regards,
 Roman                          mailto:sirok@mail.ru
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