RE: [load balancing] Alteon AD3 and DNS Caching

From: Richard O'Halloran (rohallorIZZATnortelnetworks.com)
Date: Wed May 07 2003 - 21:56:44 EDT

  • Next message: Jose Vitor Barreiro: "[load balancing] ALO"

    >It is enabled, and needs to be for some TCP services on the same Alteon.
    Graceful server failure is a per-box setting, >not a per-service setting,
    unfortunately.

    That is a pity, I agree. I try and avoid that setting completely ;)

    >> The main reason that you can't run stateless and direct access mode at
    >> the same is that the Alteon has no idea which returning UDP packets
    >> should be server translated.

    >This makes sense, but then what difference would defining PIPs make, if the
    real servers have proxy disabled?
    >PIP+DAM+UDP stateless is supported.

    That's something I can't honestly say I have tried. The main reason why
    things like PIPs and DAM allows things like that is because it means that
    the switch processor that performed the client processing also provides the
    server processing and an additional state table is used. That is why PIPs or
    DAM or are required for layer 7 processing.

    I have heard that there has been some discussion and some development to
    give some flexibility in DAM in the future, specifically as it relates to
    udp stateless.

    Regards,

    Rich.

    ---
    Richard O'Halloran
    Pre-Sales Engineer - Alteon Product Specialist
    Intelligent Internet - Nortel Networks
    rohallorIZZATnortelnetworks.com - +61 3 8866 4312
    

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