QoS configuration

I've been trying to configure QoS on a Buffalotech wireless router. The boys and girls there apparently don't know anything other than tell you to reboot the router.

I haven't had any luck in the DD-WRT forum either.

I'm trying to find out what the appropriate value for LAN Bandwidth in kbits as shown below.


Model: Buffalo WZR-1750DHPD

Firmware: DD-WRT v24SP2- (04/21/14) std - build 23709a

NOTE: Uplink and Downlink are 85% of values measured by Speedtest.net


QoS Settings

  Port: WAN

  Packet Scheduler: HTB

  Queueing Displine: FQ_CODEL

  Uplink (kbps): 3600

  Downlink (kbps): 15000


Default Bandwidth Level

  Enable Per User Default Limits: checked

  WAN Bandwidth in kbits Up: 2900

  WAN Bandwidth in kbits Down: 3400

  LAN Bandwidth in kbits: ????????????????

You can really only throttle upload speed, once a packet has been downloaded, dropping it doesn't do much good. On the LAN bandwidth, it depends on your needs. If you want to cut down on usage, set it to like 10mbps. But if this is a network where you have important local resources(such as a NAS for video storage) that need lots of bandwidth, I would set it to 50-100mbps.

I don't know much about networking, but I've successfully distributed my network using a script generator for setting upload and download guaranteed rates, and absolute ceilings for individual users, groups of users, ip ranges, etc.  http://www.kczon.com/bandwidth-limit-wrt-script-generator/

The first time you use the program, it won't be in English, but there is a button at the top to change that. The instructions in the program will explain everything else. After you generate the script, you have to go to the Administration tab of DD-Wrt and paste it into the Commands box. Then you go to the bottom, and set it as either a Startup Script or Firewall Script. Just to be safe, I just saved it as both. 

Interesting ...


The QoS just didn't seem to work very well, at least on my router. Limiting the bandwidth of each individual user did the trick. 

My goal was to limit the preference given to Cell Phone users due to real time data. The router is in a business area by a university and must coexist with other routers providing free WiFi to their customers. So, there are a great deal of passersby wanting to use their cell phones for free.

I found that enabling SIP (ports 5060 & 5061) and Skype in QoS and disabling WMM, general browsing response has greatly improved.

I'm hoping to overhear people saying their cell phones don't work well.