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    From
    SubjectRe: 2.4.19-ac4 IRQ messup?
    Date
    Thomas Mierau <tmi@wikon.de> writes:

    >I switched cables, checked the switch etc....
    >nothing helps.
    >I installed an extra PCI card which came up as eth0, making the internal ones
    >eth1 and eth2. No I started pinging with eth0, which was giving me strange
    >effects again.
    >eth0 = 192.168.47.11
    >eth1 = 192.168.47.12
    >eth2 = 192.168.47.13
    >I took a tcpdump on the receiving box. It was kind of interesting.
    >There were arp packages askin who is 192.168.47.11 and answers coming back
    >with two dofferent MAC-Id's One from the eth0 and the other one from the eth2
    >which was actually configured on IP .13
    > After I shut down etho1 and 2 and ran the box with "noapic" it preforms
    >perfect with the external card.
    >Either the NIC's are broken, or the driver or whatever. I hate that !!

    Are they all on the same ethernet? If yes, then

    a) don't do this
    b) try echo "1"> /proc/sys/net/ipv4/conf/all/arp_filter

    Regards
    Henning

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