[lwip-devel] [patch #9021] nd6: add support for RDNSS option as per RFC 6106

[Jan Breuer]

Follow-up Comment #6, patch #9021 (project lwip):

>> You can just follow the rule "last wins". 
> How would that work in dual-stack mode? IPv6 servers should be favoured, so
with automatic configuration, you'll have to keep both.
It just results in more complicated dns server list update function but it is
still somehow solvable. Another solution is to have enough space in DNS server
list so you can keep both. You can just configure this in lwipopt.h how many
items you need to keep in memory. If you configure just 2 items, just don't
count with full and correct RFC support.

 
>> Also ND6 and DHCPv6 can tell you same DNS servers. 
> Yes, they can, but I see an implementation problem here when one has a
timeout but the other doesn't. Probably not a real world issue though?
This is out of my knowledge and imagination.

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