05-03-2012 01:36 AM
I'm not sure if I'm misunderstanding how QoS is meant to work on this router, but it certainly isn't behaving how I expect.
I have configured it to give High priority to the MAC address of computer A (connected via a Cat6 cable) and Low priority to computer B (connected via wireless N).
Computer A constantly runs "ping -t www.google.com". Computer B is running a bittorrent client which has a configuration option for an upload speed cap. The download speed of the client always averages 1kB/s and my upstream connection is capable of capable of 1.5MB/s down and 35kB/s up.
With QoS on and bittorrent uncapped, I get pings from 59-400ms, bittorrent gets 18kB/s up
With QoS on and bittorrent capped to 20kB/s, I get pings from 40-70ms, with spikes above 100ms, bittorrent gets 18kB/s up
With QoS off and bittorrent uncapped, I get pings from 800-1100ms, bittorrent gets 35kB/s up
With QoS off and bitorrent capped to 20kB/s, I get pings from 40-70ms, with spikes above 100ms, bittorrent gets 19kB/s up
With bittorrent off I get a rock steady ping of 29-31ms
There are two things to notice. Firstly, just turning QoS on causes bittorrent to get a slower upload speed even though nothing else on the network is uploading. Looking at the forums, this seems to be a known issue that can be solved by "overprovisioning" the upload speed on the router QoS settings page.
Secondly (and more importantly for me) even with QoS on and computer A at High priority and B at Low priority, enabling bittorrent plays hell with my recorded ping. This is really annoying because I wanted to use QoS to deprioritise torrent traffic while I am playing online games (which require a steady low ping).
What is going on here? Am I expecting QoS to do something it can't achieve, or is the E3000 really behaving unexpectedly?
05-04-2012 04:29 PM
With reference to your concerns try to upgrade the firmware of the router. These updates may include bug fixes and functionality enhancements to the router. The firmware in the Router is an older version of firmware, so upgrade it with the latest one which can be downloaded from the Linksys/Cisco website. Here is the link for upgrading the firmware of the router: http://www6.nohold.net/Cisco2/ukp.aspx?vw=1&docid=
After successful firmware upgrade you need to reset the Router. It is recommended to reset the router once. Steps to reset the router:
Push the reset button on router for 30 seconds, turn off the router wait for 30 seconds and then power it on. Power light should blink when you perform the reset process.
After reset, reconfigure the router and then set up the QoS feature once again to check the status. Here is the link for the same: http://www6.nohold.net/Cisco2/ukp.aspx?vw=1&docid=
05-06-2012 01:19 PM
Unfortunately my router is already running the latest release of the firmware, upgraded according to the guide on the website. It didn't change the behaviour of the QoS feature.
I found in another guide (http://tomatousb.org/tut:using-tomato-s-qos-system
It's really weird to me that I'm getting so much latency increase when there is so much unutilized upload+download capacity on my link.
05-07-2012 10:32 AM
Try the following settings:
A] With the help of Cisco Connect Software (if at all you have installed the router with the help of this software)
1] Open the software and go to the option which says "Router Settings"
2] Then click on the option which says "Advanced Settings" which will take you to the router's configuration page.
3] Lower the MTU (Maximum Transmission Unit) from 1500 to 1400 or less (usually found on your router's main/ basic setup page). Here is the link for determining and setting up the correct MTU size: http://www6.nohold.net/Cisco2/ukp.aspx?vw=1&docid=
B] If you haven't installed Cisco Connect then you can log on to the router's user interface using it's default IP address in the browser which is 192.168.1.1 and type in 'admin' as the password leaving the username field blank. This will take you to the router's web interface and then follow steps as mentioned above to make the changes.