IPv6 Pain Experiment

Sun Oct 6 21:58:39 UTC 2019

On Sun, 06 Oct 2019 17:47:24 -0400, bzs at theworld.com said:

> All a strictly IPv4 only host/router would need to understand in that
> case is the IHL, which it does already, and how to interpret whatever
> flag/option is used to indicate the presence of additional address
> bits mostly to ignore it or perhaps just enough to know to drop it if
> it's not implemented.

So... how would a strict IPv4 router handle the case where 8.8.4.5.13.9/40
should be routed to Cogent, but 8.8.4.5.17.168/40 should be routed via
Hurricane Electric, and no you can't just route to wherever 8.8.4.5 goes
because there's yet another peering war and nobody's baked a cake yet, so
sending packets for either route to the wrong link will cause blackholing?

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