Serious drop in networkspeed

PeterHer
PeterHer Posts: 17
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 Freshman Member
edited April 2021 in Security

I have an internet connection of 250/40 Mbit/s. But if I perform a speedtest the download speed is only 100 Mbit/s.
I have a USG40 with 4.32(AALA.0). I am only using the default settings. I didn't make any adjustments.
Any idea what can couse this?

All Replies

  • Alfonso
    Alfonso Posts: 257
    5 Answers First Comment Friend Collector Second Anniversary
     Master Member
    Hi @PeterHer

    Does your download speed server have a gigabit card?
  • PeterHer
    PeterHer Posts: 17
    First Comment Third Anniversary
     Freshman Member
    Yes it has. Before using the USG40 the download speed was 250 Mbit/s.
    Now with the USG40 it's 100 Mbit/s.
  • Zyxel_Emily
    Zyxel_Emily Posts: 960
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 100 Answers 500 Comments
     Guru Member

    Hi @PeterHer,

     

    In our office, download/upload speed is 300/100 Mbps.

    Here is the test result using Speedtest (www.speedtest.net).

    Firmware: 4.32(AALA.0)

    USG40 is running with the default configuration file.

     

    1. Laptop is connected to ISP directly.

    ISP-----Laptop

    Download/Upload (Mbps):

    238.91/98.47

    254/98.48

    242.40/100.06

    259.61/99.69

     

    2. Laptop is connected to LAN of USG40.

    ISP----(WAN)USG40(LAN)-----Laptop

    Download/Upload (Mbps):

    183.23/99.57

    182.09/99.01

    180.89/99.89

    185.61/97.40

     

    Here is another lab test using Speedtest for your reference.

    Ethernet Throughput (With Firewall Routing, NAT and ADP enabled))

    By 1 connection, with device Default Setting (Mbps)

    http(download)/http(upload)      

    336.86/230.53

     

    Can you share with us how you run the throughput and the configuration file?


  • PeterHer
    PeterHer Posts: 17
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     Freshman Member
    I did a full reset on the USG40. After setting the WAN and LAN addresses I did find out that:
    When setting IDP or Anti Virus to ON via Wizard in easy mode the download drops from 250 to 100.
    Just setting IDP or Anti Virus to ON in Dashboard screen, there is no download drop. But after a reset there is. Seems to me that using IDP and/or Anti Virus performs a severe download drop.

    I will test the USG40 with a laptop directly connected to the USG today.


  • Zyxel_Emily
    Zyxel_Emily Posts: 960
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 100 Answers 500 Comments
     Guru Member

    It is a normal behavior that throughput drops when UTM functions are enabled.
    Here is the test result using Speedtest.

    USG40 (Firmware: 4.32) 
    IDP and AV are enabled.
    IDP base profile: wan 
    ISP----(WAN)USG40(LAN)-----Laptop

    Download/Upload (Mbps)
    101.24/93.93
    102.30/97.43
    101.73/96.94

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