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Re: nd6_free assumes all routers are processed by kernel RA
On 25/08/2019 23:55, Robert Elz wrote:
detached addrs are no
different really than addrs that don't exist (at least for a time).
So address persistence is a thing. for dhcpcd, when the carrier drops
all addresses and config are removed until it can validate an address on
a new link - to ensure we don't use an address we're not supposed to.
On NetBSD it's different - because the kernel handles DaD for IPv4 and
IPv6 addresses AND denies sending from them until validated dhcpcd
allows them to persist. This has the added benefit of persisting things
such as ssh if the subnet changes from wired to wireless and back again.
Now, if the link drops, the address will become detached so the new
dhcpcd will then drop the default route. This may kill traffic which
would be bad if the address comes back in a reasonable time. Hence my
thought to just restrict lack of a default route to duplicated addresses.
But I've not entirely thought this through yet, hence the current state
of just using useable addresses.
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