Hi,

On Mon, Sep 19, 2016 at 02:06:40PM +0200, Gerdriaan Mulder wrote:
> Depending on whether you need the link-local on the other interface
> (e.g. eth1), you could try a couple of things:
> * remove that address from the interface (which also removes the
> fe80::/64 route on that interface)
> * remove the fe80::/64 route on eth1 (although the OS might add it
> again at some point)

This should not matter. It shold actually make things worse.
Generally, do not remove fe80::/64 addresses from interfaces.

> Could you also check whether privacy extensions are enabled on eth0
> and eth1 (/proc/sys/net/ipv6/conf/*/use_tempaddr)? I have a hunch that
> this might explain the 20 minutes lifetime.

Good point. Yes.

Greetings
Marc

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