Re: 100% cpu utilization with ipv6 packets?

From: Manikantan Ramadas (
Date: 08/21/01

  • Next message: Andreas Hasenack: "Re: 100% cpu utilization with ipv6 packets?"

    Message-ID: <>
    Date: Tue, 21 Aug 2001 18:51:07 -0400 (EDT)
    Subject: Re: 100% cpu utilization with ipv6 packets?
    From: "Manikantan Ramadas" <>

    Hi Andreas,

     It looks like a DNS lookup issue to me..

     Did you try "tcptrace -n" to turn off name lookups..

     If that doesn't help, could you send us the concerned dumpfile, so we can
    have a look?


    > Hi!
    > tcptrace is unable to handle some ipv6 traffic I give it, it
    > just starts using 100% of the CPU and there is no output, I
    > have to kill it. Any known issues?
    > I'm running linux with:
    > tcptrace.6.0.0b4 compiled from source
    > tcpdump-3.6.2 (to capture the traffic)
    > libpcap-0.6.2
    > glibc-2.2.3
    > kernel-2.4.5
    > it's choking on this one at least:
    > 18:12:49.155001 xxxx::xxx:xxxx:xxxx:xxxx > xxxx::x: OSPFv3-hello 40:
    > rtrid xx.x.x.x backbone dr xx.x.x.x bdr [hlim 1]

    Robustness Principle :
    "Be liberal in what you accept and conservative in what you send"    - Jon

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