A=1 L=0 PIO

Bjørn Mork bjorn at mork.no
Tue Aug 16 13:45:16 CEST 2016

Mikael Abrahamsson <swmike at swm.pp.se> writes:
> On Tue, 16 Aug 2016, Sander Steffann wrote:
>>> I'm trying to figure out what a "normal" currently deployed in the field IPv6 host would do if it receives an RA with PIO /64 where L=0 and A=1.
>> On an implementation level what I have seen on Linux is that the L flag determines whether the route 2001:db8::/64 -> eth0 is installed or not.
> Ok, thanks everybody. So it'll still do A=1 style addressing (EUI64,
> privacy extension addressing etc)? Will it perform DAD?

Use the source, Luke1


That is:

 if (L) then add route
 if (A) then do autoconf

Without any side looking at the other flag.  Specifically: The value of
L does not affect the interpretation of A.  Which is pretty much what
RFC 4861 says too, AFAICT

So the answers to both your questions is "yes".


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