On Thu, Aug 16, 2018 at 12:41:39AM +0200, Bernhard Schmidt wrote: Hi,
> I also see this issue on several stretch VMs. In network segments where > Router Advertisements are present but the machines have a gateway set > the systems are occasionally not reachable after a reboot (<1% of the > cases I'd say, totally random). It looks like they already/still have an > IPv6 default route configured by RA when ifupdown attempts to add the > default route, which fails. Shortly after the RA route is dropped (due > to accept_ra 0) and the machine is unreachable. > > A possible solution could be to change "add" to "replace" in > https://salsa.debian.org/debian/ifupdown/blob/master/inet6.defn#L97 . I have now created a merge request for this change, as I'm still frequently bitten by this bug https://salsa.debian.org/debian/ifupdown/merge_requests/7 I have also done a local backport to the stretch version (straightforward, but a bit of context is changed so it is easier to redo). @Guus: What do you think of this? Bernhard
