[AusNOG] FW: [Ap-ipv6tf] official shutdown date for IPv4. The date he is pushing for is April 4, 2024. "IPv4 can't go on forever, " Latour said. "

[Karl Auer]

On Thu, 2014-11-06 at 15:18 +1000, Paul Gear wrote:
> Nice little lab test, but I'd like to see some more real-world
> examples.  I'm curious to know how many clients will actually honour
> that 1 second RA lifetime

The standard doesn't specify a minimum receive interval. It DOES specify
both a minimum send interface and some random delays to avoid congestion
and race conditions.

That said, if I were implementing on the host side, I would have a
configurable minimum receive interval and would ignore multiple RAs
received inside that interval. Similarly, a router can send as many
different prefixes as it likes, but sensible host implementations put a
configurable limit on how many they will try to configure. Windows
didn't at first, and you could lock up Windows by just sending it a few
thousand different prefixes.

> It also means troubleshooting routing tables on every
> client rather than on the first hop gateways.

Unavoidable if clients are going to have multiple exit paths from their
subnet, regardless of whether it's iPv4 or IPv6.

Regards, K.

-- 
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Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://twitter.com/kauer389

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