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Troubleshooting slow simultaneous wireless transfer

Discussion in 'Asuswrt-Merlin' started by creatine, Aug 25, 2019.

  1. creatine

    creatine Occasional Visitor

    Jun 16, 2017
    I am trying to figure out a slow wireless issue I am experiencing. If its "normal" behavior due to the nature of wireless. When uploading files via LAN transfer (mapped windows drive) from my PC to Media Center and PC downloading from the internet simultaneously both speeds suffer and slow to a crawl. Ex: My internet downloads go from 50mbit (my max internet connection) to about 10Mbit. LAN transfer goes from 13MB\Sec to about 5MB\sec. I would expect both speeds to remain maxed out (13MB\s LAN transfer and 50mbit download) on my PC. Doing anything network related from my PC is extremely slow during this time. If I stop the LAN transfer or the download everything goes back to normal.

    Is this "normal" for wireless ? Are there any settings on the router than could cause this ?

    I have tried updating wireless card drivers.

    Running RT-AC3100 ASUS Merlin 384.13

    Windows 10
    Asus USB AC68 adapter connected to USB3 port
    Connected to 5Gz

    Meda center:
    Windows server 2008
    Asus N53 adapter
    Connected to 5Gz network


    Last edited: Aug 25, 2019
  2. Val D.

    Val D. Senior Member

    Jun 16, 2019
    What else is running on that router?
    User Scripts, QoS, Apps Analysis, AiProtect, Traffic Analyzer, Web History, etc.?

    Disable everything not routing related and test again. You may get surprised by the results.
  3. creatine

    creatine Occasional Visitor

    Jun 16, 2017
    I am running QoS (Fresh Jr), Diversion and AI protection. I'll disable all of it and try again

    Edit: Same result. Disabled all the above. Seems the "upload" LAN transfter kills the download speed on the PC.