Re: Losing IPv6 connectivity after 20min, why?

2017-06-27 Thread Alexander Koeppe
Am 20.04.2017 um 03:53 schrieb Info: > Hello Olaf, > > I've run at the exactly same issue, but delay on my end is around ~1 min. > I'm also on fresh/brand-new Hetzner root server, no changes applied, ipv6 > wasn't working from the beginning. > > Also for some weird reason fe80::1missing lladdr (

Re: Re: Losing IPv6 connectivity after 20min, why?

2017-04-19 Thread Info
Hello Olaf, I've run at the exactly same issue, but delay on my end is around ~1 min. I'm also on fresh/brand-new Hetzner root server, no changes applied, ipv6 wasn't working from the beginning. Also for some weird reason fe80::1missing lladdr (MAC) in neighbour: # ip neigh fe80::1 dev eth0 FA

Re: Losing IPv6 connectivity after 20min, why?

2016-09-20 Thread Marc Haber
On Mon, Sep 19, 2016 at 10:58:56PM +0200, Olaf Schreck wrote: > > Check ip neigh output. Does the entry for your default gateway go > > STALE after those 20 minutes? > > Yes, exactly: > > # ip -6 nei > fe80::1 dev eth0 lladdr 0c:86:10:ed:31:ca router STALE So it is the neighbor table entry going

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Kenyon Ralph
On 2016-09-20T00:37:26+0200, Olaf Schreck wrote: > > As someone else asked, showing us the output of 'ip -6 a' and 'ip -6 > > r' could be helpful. > > Ok, sorry. I don't see anything special here: Thanks. You said it breaks when you configure eth1 though. What is the configuration you are putti

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Olaf Schreck
> As someone else asked, showing us the output of 'ip -6 a' and 'ip -6 > r' could be helpful. Ok, sorry. I don't see anything special here: # ip -6 ro 2a01:4f8:191:::/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth1 proto kernel metric 2

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Kenyon Ralph
On 2016-09-19T22:58:56+0200, Olaf Schreck wrote: > I had no plans to fiddle with link-local addresses, and of course eth1 > settings should not matter. I just disabled IPv6 on eth1 for debugging, > and suddenly IPv6 worked >20min. Maybe coincidence rather than causality. > > I'd like to lear

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Olaf Schreck
> Check ip neigh output. Does the entry for your default gateway go > STALE after those 20 minutes? Yes, exactly: # ip -6 nei fe80::1 dev eth0 lladdr 0c:86:10:ed:31:ca router STALE > Also check the lifetime of any SLAAC ip addresses given in ip addr > output. forever > Do you really need to me

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Olaf Schreck
I didn't reply yet because I'm still testing stuff. But privacy extensions are not the problem, they're turned off, no?: # sysctl -a | grep tempad net.ipv6.conf.all.use_tempaddr = 0 net.ipv6.conf.default.use_tempaddr = 0 net.ipv6.conf.lo.use_tempaddr = -1 net.ipv6.conf.eth0.use_tempaddr = 0 net.i

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Matthew Hall
On Mon, Sep 19, 2016 at 02:06:40PM +0200, Gerdriaan Mulder wrote: > 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. > > ~ Gerdriaan I have DEFINITELY run into

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Marc Haber
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) > * r

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Marc Haber
On Mon, Sep 19, 2016 at 12:55:11PM +0200, Olaf Schreck wrote: > My hoster (Hetzner) routes the 2a01:4f8:191::/64 network to the > server. Following their instructions, I assign a static address from that > block and set the default route to fe80::1, either manually > ip -6 addr add 2a01:4f

Re: Losing IPv6 connectivity after 20min, why?

2016-09-19 Thread Gerdriaan Mulder
Hi Olaf, 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 a