I spent far too long figuring out how to do this not share it. Running an online backup service (Crashplan) on my laptop was killing my network for everything else that was using it. I documented in a previous post how to set DSCP packet headers on Windows 7 for Crashplan. This post is about the next step of doing something actually useful in the router.
…speak for themselves:
- No network traffic, standard config:
Ping : 17-19ms, Jitter : 3-6ms
- Active backup, standard config:
Ping : 111-329ms , Jitter : 47-68ms
- Active backup, QoS config:
Ping : 26ms, Jitter 4-5ms
This video shows how I setup my Win7 pc running Crashplan online backup to set DSCP in the packet headers for upload traffic. It then shows setting up the Draytek 2920n QoS feature so that the tagged DSCP traffic tagged AF11 (decimal 10) is dramatically reduced by up to 97% when any other traffic requires the bandwidth.
In the video I run a couple of network benchmarks using Speedtest.net and Pingtest.net before repeating the tests with Crashplan online backup running on a default config. This shows the significant impact on ping times. After the packet headers are set using gpedit.msc the router QoS is configured to de-prioritize this traffic down to just 3% of the available bandwith. The tests are then repeated with an active backup running.
I found that it easier to de-prioritize traffic that isn’t important rather than try to prioritize traffic that is.
See the video for all the steps involved. Best viewed full-screen in HD.
NOTE: Click through to the native youtube page for video timings if you want to just straight in.