<br><br><div class="gmail_quote">On Wed, Jun 12, 2013 at 2:11 AM, Steven Barth <span dir="ltr"><<a href="mailto:cyrus@openwrt.org" target="_blank">cyrus@openwrt.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>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. <br>
<br></div></div></blockquote><div><br>I'll be testing over the next week or so, more if I can line up the usual suspects to install this release... or another quick one if I can figure out the delta between 6in4 last month and now.<br>
<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><div>
I haven't heard about TOS inherit until now either and this am not
sure how it can be setup on Linux.</div></div></blockquote><div><br>it's just part of the ip tunnel line, wherever that gets called... example:<br><br>ip tunnel add he-ipv6 mode sit remote 72.52.104.74 local 172.20.26.36 ttl 255 tos inherit<br>
<br>I have no idea why it's not on by default. It's useful having the ECN bits if you are using ECN, useful having the tos field if you are trying to make ssh work with the imm bits over ipv6, etc, etc. <br> <br></div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><div><div><div class="h5"><br>
<br>
<br>
On 12.06.2013 09:37, Dave Taht wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite">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,<br>
to the header and back)<br>
<br>
Also you might want to look over the patch at:<br>
<br>
<a href="https://lists.bufferbloat.net/pipermail/bloat-devel/2013-June/000435.html" target="_blank">https://lists.bufferbloat.net/pipermail/bloat-devel/2013-June/000435.html</a><br>
<br>
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....<br>
<br>
<div class="gmail_quote">On Wed, Jun 12, 2013 at 1:00 AM, Steven
Barth <span dir="ltr"><<a href="mailto:cyrus@openwrt.org" target="_blank">cyrus@openwrt.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Not having looked at your particular 6in4 setup but I can
imagine where the issue comes from.<br>
<br>
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.<br>
<br>
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: <a href="http://wiki.openwrt.org/doc/uci/network6#in4.tunnel.henet.tunnelbroker.sixxs.static.tunnel" target="_blank">http://wiki.openwrt.org/doc/uci/network6#in4.tunnel.henet.tunnelbroker.sixxs.static.tunnel</a><br>
<br>
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:<br>
<a href="http://wiki.openwrt.org/doc/uci/network6#downstream.configuration.for.lan-interfaces" target="_blank">http://wiki.openwrt.org/doc/uci/network6#downstream.configuration.for.lan-interfaces</a><br>
<br>
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".<br>
<br>
<br>
I hope this helps.<br>
<br>
<br>
Cheers,<br>
<br>
Steven
<div>
<div><br>
<br>
<br>
<br>
On 12.06.2013 08:10, Dave Taht wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div>
And is at:<br>
<br>
<a href="http://snapon.lab.bufferbloat.net/%7Ecero2/cerowrt/wndr/3.8.13-7/" target="_blank">http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.8.13-7/</a><br>
<br>
I've had it up and running a few days on a couple
routers,<br>
<br>
and yes, I'm still trying to take some time off but:<br>
<br>
+ can't crash it over wifi anymore<br>
+ AQM + gui is coming along, am looking at gargoyle's
methods a bit now...<br>
<br>
- Known bug: 6in4 does not work via the gui or openwrt
config file -<br>
this bug has existed for about a month now<br>
and I haven't looked into it. I did look into fixing
fq_codel<br>
performance under 6in4, and that patch is in here,<br>
so after a bit more testing I'll try to get that
upstream...<br>
<br>
- the results I get from 802.11e are even more dismal
than usual when<br>
the VI and VO queues are in full use.<br>
+ For purely best effort wifi traffic, things look
pretty good.<br>
<br>
I am seriously considering disabling 802.11e negotiation
in the next<br>
release.<br>
<br>
I did prove 6in4 is working with the
std-from-hurricane-electric script,<br>
so it's a bug in netifd, cero's config, or elsewhere at
the openwrt level...<br>
<br>
modprobe ipv6<br>
ip tunnel add he-ipv6 mode sit remote $the_he_tunnel
local $my_local_ip<br>
ttl 255 tos inherit<br>
<br>
# Note that I don't know if openwrt turns on tos inherit
or not, btw,<br>
need to look into it. It's potentially useful<br>
<br>
ip link set he-ipv6 up<br>
ip addr add $mylink/64 dev he-ipv6<br>
ip route add ::/0 dev he-ipv6<br>
ip -f inet6 addr<br>
<br>
<br>
--<br>
Dave Täht<br>
<br>
Fixing bufferbloat with cerowrt:<br>
<a href="http://www.teklibre.com/cerowrt/subscribe.html" target="_blank">http://www.teklibre.com/cerowrt/subscribe.html</a><br>
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Dave Täht<br>
<br>
Fixing bufferbloat with cerowrt: <a href="http://www.teklibre.com/cerowrt/subscribe.html" target="_blank">http://www.teklibre.com/cerowrt/subscribe.html</a>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Dave Täht<br><br>Fixing bufferbloat with cerowrt: <a href="http://www.teklibre.com/cerowrt/subscribe.html" target="_blank">http://www.teklibre.com/cerowrt/subscribe.html</a>