IPv6 problems with multiple interfaces

I am running kernel 2.4.3 and I have run into problems
with IPv6 when I want to use more than one network interface
card simultaneously. IPv6 works fine with one interface
but when I add another, it starts dropping packets on
the first interface. This seems to be related with
incoming Router Advertisement messages on the other
interface. About 50% of the packets in ping6 start to
get dropped after I put the other interface up.

I have added myself a small patch in ndisc.c so that
there is only one default route in the routing table
at any time. Without that things work even worse.

I have not figured out what makes IPv6 drop packets.
I would really appreciate if someone who knows
Linux IPv6 code would contact me.

Please CC to my e-mail address, as I do not
subscribe to linux-kernel.

BR,
Teemu

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Teemu Rinta-aho                        [e-mail]
NomadicLab, Ericsson Research               [phone]
FIN-02131 Espoo, Finland                   [phone]
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