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hiptechboy
Posts: 1,557
Registered: ‎01-03-2011
Accepted Solution

E4200 Poor Qos Upload Speed Detection

I've seen people with occasional issues like this in the past, but has anyone noticed that enabling auto detection of the upstream bandwidth in the qos tab results in a significantly lower than normal maximum upload speed? I have the Blast plan from comcast (20/2 sustained; 30/4 with powerboost). Here are the results.

 

With the Qos OFF:

 

Estimating capacity:
Upstream: 4163 Kbps.
Downstream: 29079 Kbps.
The measurement will take upto 2.5 minutes. Please wait.
Checking for traffic shapers:
Upstream: Burst size: 9894-9970 KB;
Shaping rate: 2090 Kbps.
Downstream: Burst size: 19571-19934 KB;
Shaping rate: 21280 Kbps.

Estimating capacity:Upstream: 4163 Kbps.Downstream: 29079 Kbps.
The measurement will take upto 2.5 minutes. Please wait.
Checking for traffic shapers:
Upstream: Burst size: 9894-9970 KB;Shaping rate: 2090 Kbps.
Downstream: Burst size: 19571-19934 KB;Shaping rate: 21280 Kbps.

 

With Qos on AUTO:

 

Estimating capacity:

Upstream: 1433 Kbps.

Downstream: 30919 Kbps.


The measurement will take upto 3.0 minutes. Please wait.


Checking for traffic shapers:


Upstream: No shaper detected.

Median received rate: 1488 Kbps.


Downstream: Burst size: 19142-19603 KB;

Shaping rate: 21317 Kbps.

 

 

With Qos ON Manual 2mbps:

 

 

Estimating capacity:

Upstream: 1431 Kbps.

Downstream: 31001 Kbps.

 

The measurement will take upto 3.0 minutes. Please wait.

 

Checking for traffic shapers:

 

Upstream: No shaper detected.

Median received rate: 1456 Kbps.

 

Downstream: Burst size: 19087-19563 KB;

Shaping rate: 21280 Kbps.

 

 

 

I don't work for Cisco. I'm just here to help.
sovereignty68
Posts: 6
Registered: ‎06-01-2011

Re: E4200 Poor Qos Upload Speed Detection

I can confirm this issue on my E4200 as well, my upstream is 3mbps, I have to put in 5000kbps in manual to get full 3mbps upstream speed. Once in AUTO, speed reduced down to 1.45mbps just like yours. It's a BUG obviously. CISCO, fix it please.

sovereignty68
Posts: 6
Registered: ‎06-01-2011

Re: E4200 Poor Qos Upload Speed Detection

Is everyone choose to ignore this?

hiptechboy
Posts: 1,557
Registered: ‎01-03-2011

Re: E4200 Poor Qos Upload Speed Detection

I've contacted their main office because the case manager who called me was too incompetent to even know what Qos was. She put me on hold, then hung-up and never called back. I was not being rude to her in anyway so I don't know what her problem was. So I'm waiting for a call from the main office and I have a list of issues to address to them and their firmware team.
I don't work for Cisco. I'm just here to help.
panzies4panties
Posts: 163
Registered: ‎04-16-2010

Re: E4200 Poor Qos Upload Speed Detection

Just curious, what tool did you use to record these data?

Were you wired or on wireless?

hiptechboy
Posts: 1,557
Registered: ‎01-03-2011

Re: E4200 Poor Qos Upload Speed Detection

I tested through a wired connection. The tool is called Shaper Probe

I don't work for Cisco. I'm just here to help.
hiptechboy
Posts: 1,557
Registered: ‎01-03-2011

Re: E4200 Poor Qos Upload Speed Detection

I got ahold of the engineers and they said they'll check it out. 

I don't work for Cisco. I'm just here to help.
flar
Posts: 1
Registered: ‎07-02-2011

Re: E4200 Poor Qos Upload Speed Detection

[ Edited ]

I can confirm these identical issues.  With speed measured via speedtest.net and firmware 1.0.02:

 

QoS off, I get 36Mb down, 6.7Mb up

 

QoS on with Auto upstream detection I get 35-36Mb down, but very erratic, 1Mb up.  Also, it takes a few seconds longer (very noticeable) for the upstream test to even start.

 

QoS on with 6Mbits specified manually I get 36Mb stable down and around 4Mb up (no noticeable delay on starting the upstream tests).

 

QoS on with 10Mbits specified manually (basically I lied to it), I get back to 36Mb stable down and about 6.5Mb up.

 

All of these tests are very repeatable.

 

Not only would I like to see the Auto fixed, but I think taking such a large hit in download speed is a major problem.  The packets for higher priority services should be prioritized, not reserved.  My one QoS device (my Ooma Telo) was completely quiet during all of this testing so my speedtest traffic should have had nearl all of my bandwidth, no?

hiptechboy
Posts: 1,557
Registered: ‎01-03-2011

Re: E4200 Poor Qos Upload Speed Detection

Netgear's router also causes a delay so I guess it's normal. When I use auto on Netgear's it only gives me 256kbps....but manual on their router works correctly. 

I don't work for Cisco. I'm just here to help.
Gnuus
Posts: 6
Registered: ‎07-05-2008

Re: E4200 Poor Qos Upload Speed Detection

If you are experiencing a slow upload speed with the Linksys E4200, try setting Upstream Bandwidth at 2-3 times your maximum upload speed and you may just speed up slow internet upload speeds.