Re: [Cerowrt-devel] cerowrt dev 3.8.13-7 released

[Steven Barth <cyrus@openwrt.org>]

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Hmm I don't currently run 6in4 on an OpenWrt router but directly on my 
proprietary DSL-router which does PD so I can't test this right now.

I haven't heard about TOS inherit until now either and this am not sure 
how it can be setup on Linux.


On 12.06.2013 09:37, Dave Taht wrote:
> Thank you! I'll look into it in the morning. Do you do a tos inherit 
> on the setup? Seems useful (copies the entire tos field, including ecn 
> bits,
> to the header and back)
>
> Also you might want to look over the patch at:
>
> https://lists.bufferbloat.net/pipermail/bloat-devel/2013-June/000435.html
>
> You can see the effect on (a saturated) 6in4 system via tc class show 
> dev your_device. I only slammed it in yesterday so I haven't been able 
> to A/B the results against a system without the patch, so no 
> warrantees express, written or implied....
>
> On Wed, Jun 12, 2013 at 1:00 AM, Steven Barth <cyrus@openwrt.org 
> <mailto: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/ <http://snapon.lab.bufferbloat.net/%7Ecero2/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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>
>
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>
>
>
>
> -- 
> Dave Täht
>
> Fixing bufferbloat with cerowrt: 
> http://www.teklibre.com/cerowrt/subscribe.html 


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