1Gig Dual Wan Inconsistent Speed

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Lestrod Gould

• August 30, 2023 20:48

I have submitted a case for this but wanted to post here and see if anyone else is experiencing this issue.

I have Dual WAN setup with AT&T and Spectrum both 1Gig Circuit.

AT&T is the primary and Spectrum backup. Mode is failover.

Even though the mode is backup I have routed some systems to use the backup ISP but am noticing that I can only get 550Mbits MAX speed on this circuit. I can get 940Mbits up and down on primary AT&T circuit no issue. 

I have tested the cables (they are good) also tested direct connection from PC to Backup ISP (Spectrum) modem and can get 980Mbits down no issue but it drops to 550Mbits when Firewalla Gold is connected to modem.

The WAN ports for the ISP Modems are 2.5G ports so no mismatch with speed.

Has anyone seen this issue before?

 

 

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  Firewalla

  • August 30, 2023 22:43

  How are you testing the secondary ISP? is your secondary ISP running PPPoE?

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  Lestrod Gould

  • August 30, 2023 23:10

  Not running PPPoE. 

  
  Tested from browser to speedtest.net. seeing 550Mbits max.
  
  Tested from browser to http://fire.walla:8833/ss/ LAN - Firewalla seeing 1Gig or more consistently.

  Tested from firewalla CLI using speedtest on each ISP interface seeing 1Gig or more consistently.

  So I do not understand why the inconsistent lower speed using speedtest.net only for one ISP though.

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  Firewalla

  • August 30, 2023 23:17
  • Edited

  "Tested from browser to speedtest.net. seeing 550Mbits max." how did you direct traffic to the secondary ISP?

  When you are testing inside the box and pointing to the secondary WAN, routing is not involved, so likely you get everything to the secondary WAN. If you are routing using firewalla, and your speedtest program uses a server that's not on the route, it may split traffic 

  So, if you are testing on the box and getting gigabit, the problem is very likely to be related to speedtest

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  Lestrod Gould

  • September 02, 2023 03:30

  ISP2 is the primary no need to setup route. I am using the same speedtest.net site on the same PC to both ISPs.

  Also on the firewalla box testing using speedtest to each ISP interface I am consistently getting 1Gig for both ISP so not sure the speedtest is the issue.
  
  
  

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