On Wed, Jun 12, 2013 at 1:00 AM, Steven Barth <cyrus@openwrt.org> wrote:

Not having looked at your particular 6in4 setup but I can imagine where the issue comes from.

Source-based IPv6 routing was introduced a few weeks ago to properly support multiple IPv6 uplink-interfaces. Therefore OpenWrt only let's you route through the tunnel if it knows you have a suitable source address.

That means you now have to add your routed /64 or /48 in the 6in4 tunnel settings (UCI-variable ip6prefix) either through the WebUI or in /etc/config/network directly. See: http://wiki.openwrt.org/doc/uci/network6#in4.tunnel.henet.tunnelbroker.sixxs.static.tunnel

In addition configuring the downstream interfaces using ip6addr is not supported any more. One has to use the ip6assign/ip6hint/ip6class method as described here:
http://wiki.openwrt.org/doc/uci/network6#downstream.configuration.for.lan-interfaces

If you still use ip6addr instead of the new mechanism you might simply get "Network Unreachable" errors or - in newer versions - "Source address failed ingress/egress policy".

I hope this helps.

Cheers,

Steven

On 12.06.2013 08:10, Dave Taht wrote:

And is at:

http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.8.13-7/

I've had it up and running a few days on a couple routers,

and yes, I'm still trying to take some time off but:

+ can't crash it over wifi anymore
+ AQM + gui is coming along, am looking at gargoyle's methods a bit now...

- Known bug: 6in4 does not work via the gui or openwrt config file -
this bug has existed for about a month now
and I haven't looked into it. I did look into fixing fq_codel
performance under 6in4, and that patch is in here,
so after a bit more testing I'll try to get that upstream...

- the results I get from 802.11e are even more dismal than usual when
the VI and VO queues are in full use.
+ For purely best effort wifi traffic, things look pretty good.

I am seriously considering disabling 802.11e negotiation in the next
release.

I did prove 6in4 is working with the std-from-hurricane-electric script,
so it's a bug in netifd, cero's config, or elsewhere at the openwrt level...

modprobe ipv6
ip tunnel add he-ipv6 mode sit remote $the_he_tunnel local $my_local_ip
ttl 255 tos inherit

# Note that I don't know if openwrt turns on tos inherit or not, btw,
need to look into it. It's potentially useful

ip link set he-ipv6 up
ip addr add $mylink/64 dev he-ipv6
ip route add ::/0 dev he-ipv6
ip -f inet6 addr

--
Dave Täht

Fixing bufferbloat with cerowrt:
http://www.teklibre.com/cerowrt/subscribe.html

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