On 12/22/24 14:15, Nick Hilliard wrote:
As a separate issue, hold timers should generally be of a comparable
order of magnitude to the non-availability effect they're attempting
to mitigate. Inter-domain routing convergence is often measured in
minutes rather than seconds. So even if the protocol layer worked at
IXPs without causing control plane meltdown, it's still a mechanism
which which has a trigger timer two orders of magnitude faster than
the general case of DFZ reconvergence. I can't see that this would
help overall inter-domain routing stability.
I think this is the fundamental question.
BGP is stable and scales well given its global scope, not only because
it turns like a tanker, but because we accept that it turns like a tanker.
Now, in a world of TikTok Brain and Uber Eats where we are used to
getting what we want instantly, imposing that on to BGP, even if
sneakily, is probably not something we want. At least not at a global scale.
Mark.
