Fix IPv6 ECMP handling with 4.11+ kernel

[Ondrej Zajicek]

On Fri, Sep 01, 2017 at 11:59:19AM +0200, Vincent Bernat wrote:
> > We have lots of kit (e.g. https://www.arista.com/en/products/7280r-series)
> > that comes with:
> >
> > 	Linux labtest 3.4.43.Ar-3964936.4173F #1 SMP PREEMPT Mon Dec 19 14:31:21 PST 2016 x86_64 x86_64 x86_64 GNU/Linux
> >
> > And which is impossible for us to upgrade to newer kernel versions.
> > If bird 2.0 will require Linux >= 4.11 for IPv6 multipath, then
> > upgrading to bird 2.0 would not be an option for us.
> 
> I agree with you. Currently, there is no distro with a 4.11+ kernel
> (Ubuntu LTS is 4.4, Debian is 4.9, CentOS is 3.13). It seems a bit early
> to require such a recent kernel.

Well, that was a reason why i was reluctant for long to include IPv6
multipath support in BIRD, hoping that Kernel people fix their API.
That happened about half year after i finally gave up.

OK, so we will likely postpone the transition. Hopefully our plan to ditch
2.4.x kernel workarounds in BIRD 2.0 will meet less resistance. ;-)

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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