Re: [pilc] RE: AD request / L2 Triggers Chapter Statement

From: Joe Touch (touch@ISI.EDU)
Date: Tue Jul 09 2002 - 19:38:09 EDT

  • Next message: Vernon Schryver: "Re: [pilc] RE: AD request / L2 Triggers Chapter Statement"

    Lloyd Wood wrote:
    >>>and not as a MIB. My question is: why are endhost implementations so
    >>>STUPID compared to routers in this respect, in not even knowing what
    >>>they're immediately connected to and whether it's there or not?
    >>
    >>Hosts that run routing software aren't.
    >
    > They are, because the routing software doesn't talk to the endhost
    > applications. No real integration or communication between the two.

    OK - so build a framework for that; that's an API, not a protocol, and
    not necessarily in scope for the IETF (it's not even socket level).

    >>If you have a multihomed host,
    >>run routing on that host. Embed the functionality of a router in the
    >>endpoint, and call it a day - we did 5 years ago:
    >>
    >> "Dynamic Host Routing for Production Use of Developmental Networks"
    >>J. Touch and T. Faber, Proc. ICNP '97, Atlanta, Oct. 1997, pp. 285-292.
    >>(www.isi.edu/touch/pubs/)
    >
    > As for calling it a day - I see you couldn't maintain a TCP connection
    > with it since you didn't have control of the source address the SunOS
    > stack set

    Yup. That's been fixed in some OS's for a while, and won't go away with
    any other solution either.

    > - p5 - and you end with a plea for static loopback
    > addresses, as found in all good router software for years, to fix
    > this.

    Yup - they're available now. It has been 5 years.

    >>>1) MIBs aren't realtime. Not so sure they're desirable, either.
    >>
    >>IP isn't realtime either.
    >
    > Why not?

    OK - so if you're on that tack too, please send comments to the IAB.
    This is definitely outside the scope of a single WG.

    >>>2) local implementations don't use MIBs to talk to themselves.
    >>> An endhost using a MIB to tell itself about its own link
    >>> interfaces? I don't think so.
    >>
    >>How do routers do it?
    >
    > A simple function call to find out would suffice.

    Fine. Implement one. Why standardize it?

    Joe

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