netdev - Re: IPv6 addresses stay tentative (Linux 5.4.6, 5.4.7)

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Message-ID: <cd988e58-5e75-5ba5-185b-fd0f2a2f84df@gmail.com>
Date:   Thu, 2 Jan 2020 09:53:06 -0700
From:   David Ahern <dsahern@...il.com>
To:     Nico Schottelius <nico.schottelius@...leich.ch>,
        netdev@...r.kernel.org
Subject: Re: IPv6 addresses stay tentative (Linux 5.4.6, 5.4.7)

On 1/1/20 4:30 PM, Nico Schottelius wrote:
> 
> https://roy.marples.name/archives/dhcpcd-discuss/0002774.html
> 
> p.s.: I am using accept_ra = 2, because forwarding is also enabled.
> 
> Hello,
> 
> it seems something in the kernel code changed in regard to setting IPv6
> addresses usable (i.e. dad done). Since 5.4.6 IPv6 addresses setup
> statically or via autoconf (router advertisements) seem so stay in
> "tentative" state forever.
> 
> I did not experience this behaviour in 5.3.13 (*) and it seems I am not
> the only one affected:
> 
> I turned dhcpcd off to test whether it happens without it and indeed the
> problem seems to be unrelated to dhcpcd.
> 
> Does anyone know about a recent change that may cause this behaviour?
> 
> Best regards,
> 
> Nico
> 
> (*) I cannot boot kernels 5.4.x < 5.4.6, as the wifi card does not show
> up with them.
> 

I do not see this behavior with vanilla 5.5.