[Cerowrt-devel] cerowrt dev 3.8.13-7 released

Steven Barth cyrus at openwrt.org
Wed Jun 12 04:00:56 EDT 2013

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: 

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:

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.



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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> Cerowrt-devel mailing list
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