William Herrin wrote: > On Mon, Nov 24, 2008 at 11:15 PM, Robin Whittle <[EMAIL PROTECTED]> wrote: > >>> By contrast, a multiple-LOC multihomed host could detect the failure >>> of one of its LOCs (the one associated with the failed link) within a >>> few hundred milliseconds and switch to using just the LOCs which still >>> work. Detection is straightforward: if you're round-robining through >>> the available LOCs as you send packets, the failed LOC sets are the >>> ones that stop reliably returning responses. >>> >> I can't see how every multihomed host could be required to >> continually test reachability with extra packets, or that it would be >> good to have each host sending out packets through multiple ISP links >> as a means of detecting an outage. >> > > Who said anything about sending extra packets? The payload packets are > the test. The acks (or their absence) are the response to the test. > >
This if you assume symmetric traffic (e.g., TCP) and symmetric routing (i.e., A -> B = B -> A). IMHO you can't make this assumption. Cheers Luigi _______________________________________________ rrg mailing list [email protected] https://www.irtf.org/mailman/listinfo/rrg
