[Cake] How to test Cake on TP-Link WDR3600

[Sebastian Moeller]

Hi Alec,

On Jul 25, 2015, at 19:38 , Alec Robertson <alecrobertson13 at gmail.com> wrote:

> I’ve uploaded all the files to the router and rebooted and very oddly, “cake" doesn’t show up as a qdisc but “layer_cake.qos” and “piece_of_cake.qos” show up as Queue setup scripts.

	Ah, this just shows that your sqm.lua is older than I assumed. No big issue just replace the /usr/lib/lua/luci/model/cbi/sqm.lua on your router with the attached sqm.lua. That should fix that issue. 
Then please select cake as “Queueing discipline” and piece_of_cake.qos as “Queue setup script”, also make sure to go to the “Link Layer Adaptation” tab and select Ethernet… as “Which link layer to account for:” and put in probably 8 as “Per Packet Overhead (byte):” (not quite sure what the correct value is for your ISP), AND check the checkbox named “Show Advanced Linklayer Options, (only needed if MTU > 1500). Advanced options will only be used as long as this box is checked.” and finally select cake as “Which linklayer adaptation mechanism to use; for testing only”. That should get you started. Most likely your firmware will not fully allow to specify overhead for cake, but we will diagnose this and the revert to fix this up then most likely is to select tc_stab as “Which linklayer adaptation mechanism to use; for testing only”.

With a bit of luck this is all that is needed to get you going.

Best Regards
	Sebastian


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> 
> Weird.
> 
> --
> Alec Robertson
> 
> 
> On Sat, Jul 25, 2015 at 6:15 PM, Sebastian Moeller <moeller0 at gmx.de> wrote:
> 
> Hi Alec, 
> 
> 
> On Jul 25, 2015, at 18:49 , Alec Robertson <alecrobertson13 at gmail.com> wrote: 
> 
> > Well I've already got confused and we haven't even started yet - my apologies. 
> 
> Then we are off to a good start ;) 
> 
> > 
> > When you say "...select cake as qdisc and piece_of_cake.qos as script..." how exactly do you do that? 
> 
> Ah, this requires luci-app-sqm, you might be able to install this from the router’s GUI or it might be installed already; there should be a SQM tab in the network menu and there you should be able to configure things. http://wiki.openwrt.org/doc/howto/sqm has some advice about how to set things up. Please have a look and let me know what specific questions arise ;) 
> 
> Best Regards 
> Sebastian 
> 
> 
> > 
> > Again I'm sorry if I'm being silly! :P 
> > 
> > 
> > Yours sincerely, 
> > Alec Robertson. 
> > 
> > On 25 July 2015 at 17:27, Sebastian Moeller <moeller0 at gmx.de> wrote: 
> > Hi Alec, 
> > 
> > On Jul 25, 2015, at 17:45 , Alec Robertson <alecrobertson13 at gmail.com> wrote: 
> > 
> > > Hello, 
> > > 
> > > I’ve flashed the OpenWRT image for the TP-Link WDR3600 from 2015-06-23 (http://snapon.lab.bufferbloat.net/~cero3/lupin/ar71xx/) and it has installed correctly. 
> > > 
> > > How do I go about setting it up for my UK TalkTalk Fibre connection (using a VDSL modem connected to the TP-Link router: the TP-Link router gets an IP address via DHCP). 
> > > 
> > > My sincere apologies if any of this is really obvious and I’ve been silly and missed it. 
> > 
> > Maybe try luci-app-sqm and sqm scripts? 
> > Attached you will find the most recent files for sqm-scripts, just move all the files in the archive to the corresponding locations on your router and the select cake as qdisc and piece_of_cake.qos as script. (You might need a more recent luck-app-sqm, but first try what happens if you try the new scripts). After using the GUI to properly configure your interface you can always run either: 
> > /etc/init.d/sqm stop 
> > or 
> > /etc/init.d/sqm start 
> > to stop and start sqm-scripts manually. Running: 
> > tc -d qdisc 
> > should give you some feedback whether things worked as you intended. If you want to tests this I am happy to help you along the way, just holler where things break ;). 
> > 
> > Best Regards 
> > Sebastian 
> > 
> > 
> > > 
> > > 
> > > — 
> > > Alec Robertson 
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> > 
> > 
> > 
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