[Cerowrt-devel] Anyone using PPPoE with Sugarland?

[Dave Taht]

Netanalyzer's metrics are wrong when used with a fair queuing or codel
based system. They use a single udp flood to measure the "queue" when
in the "fq" portion of fq_codel there are 1024 by default, and when
codel kicks in, queue depth is reduced eventually to a level that tcp
would expect, but has no effect on a single udp flood.

Use a ping vs a big upload as your test, or the rrul test, after
setting your up/download appropriately.



On Sat, Jan 5, 2013 at 1:37 PM, William Katsak <wkatsak at gmail.com> wrote:
> Hello,
>
> I am experimenting with using Cero/Sugarland on a PPPoE connection, and can't seem to find a config of simple_qos that works well.
>
> The service is DSL, PPPoE, 3M/768K. Without any qos, the router works well, as expected. When I try to use simple_qos, the clients have trouble loading websites (hangs while loading, etc).
>
> Netlyzer shows upstream buffering of about 650ms, consistently. I have tried various higher and lower values for UPLINK and DOWNLINK, but nothing seems to help. Anyway, I think 15-20% below link should be fine.
>
> Here is my config:
> UPLINK=550
> DOWNLINK=1900
> DEV=ifb0
> IFACE=ge00
> DEPTH=42
> TC=/usr/sbin/tc
> FLOWS=8000
> PERTURB="perturb 0" # Permutation is costly, disable
> FLOWS=16000 #
> BQL_MAX=3000 # it is important to factor this into the RED calc
>
> CEIL=$UPLINK
> MTU=1492
> ADSLL=""
> PPOE=yes
>
> Couple of things I am unsure about:
> 1) Should the IFACE be ge00 or pppoe-ge00?
> 2) Should the MTU be the pppoe mtu (1492) or the ethernet (1500)
>
> One last thing: I have the lan split up into VLAN interfaces se00.1, se00.100, and se00.200. Everything otherwise works as expected with these, but could the naming be breaking something?
>
> If anyone is willing to share a working configuration it would be much appreciated.
>
> Thanks,
> Bill Katsak
>
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-- 
Dave Täht

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