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wanumet
wanumet
New Member
September 5, 2024
Question

FORTIGATE FG200E CUTS INTERNET FROM 30MB/S TO 3MB/S

  • September 5, 2024
  • 4 replies
  • 1485 views

Hello Team
I am new to this forum but have a big issue.
We have FG200E running on 

Firmware
v7.2.8 build1639 (Mature)


The ISP provides 30Mbps, and when we test with a laptop connected directly to the ODU, we get over 25Mbps; however, on Wi-Fi and LAN through the FortiGate, we get less than 5Mbps. 
There are not many configurations on the firewall, it is only working as a router and 1 site-to-site VPN which is not active.
Kindly guide me on how to solve this.

4 replies

nradia_FTNT
Staff
nradia_FTNT
Staff
September 5, 2024

Hello,

 

This is a useful KB article for troubleshooting bandwidth issues:

 

https://community.fortinet.com/t5/FortiGate/Technical-Tip-Low-throughput-troubleshooting/ta-p/272657

    wanumet
    wanumetAuthor
    New Member
    September 8, 2024

    Hello @nradia_FTNT 

    Thanks for the KB. After following it, I found nothing wrong with anything but still the Internet is slow. I really don't know what happened. 

    vbandha
    Staff
    vbandha
    Staff
    September 8, 2024

    Hi @wanumet 

    Can you try running a continuous ping from fortigate and end device to see if there is any packet loss?

    https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Using-PING-options-from-the-FortiGate-CLI/ta-p/190774

     

    Can you also try using a different interface on fortigate if you get same speed there as well?

     

    Also take a pcap on WAN interface and check if there is any retransmission or other errors seen there.

    Regards,

    Varun

    wanumet
    wanumetAuthor
    New Member
    September 8, 2024

    Hello @vbandha 

    A continuous ping from an end device to the firewall does not break at all. Pinging the Google dns 8.8.8.8 also does not break. 

    I will configure a new port and check 

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