100 Mbps instead of 1Gbps LAN speeds- Firewalla Purple

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Kevin Larsen

• October 27, 2023 00:41

The port speed of my LAN is showing 100 Mbps instead of 1Gbps. Therefore, I get less than 100Mb speed instead of 300Mb that I was getting before adding the Firewalla. Layout= ISP>Firewalla>Gigabit Switch>Wireless AP.

I get the same speeds from devices connected via ethernet as well as wireless. What can I do to not continue limiting speed to 100Mb?

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  Stuart

  • October 27, 2023 08:17

  I've seen some switches fail autonegotiation, so if you can force gigabit for the port on the switch I'd try that. Another common cause of this kind of thing is a faulty cable. Maybe try swapping in another cable?

   

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  Firewalla

  • October 27, 2023 16:36

  I'd also suggest changing the port on the switch that firewalla is connecting to, and see if it make any difference.

   

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  Kevin Larsen

  • October 27, 2023 16:52

  The interesting thing is I changed the port on the switch and it changed to 1Gb for 2 hours and then went back to 100Mb.

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  Firewalla

  • October 27, 2023 17:02

  Did you change cable? 

  What is the make and model of your switch? is it managed? do you have another extra switch you can add in between purple and your current switch? (this will help us test if the problem is the switch or firewalla)

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  Kevin Larsen

  • October 27, 2023 18:20

  I did change out the cable. Same.
  The switch is a TP Link TL-SG1024D - unmanaged. I don’t have an extra Gb switch, however, when removing the firewalla from the network my speeds are not limited. I was getting the full speed through ISP up to 900+ Mb

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  Firewalla

  • October 27, 2023 18:31

  The reason for the slowness is due to the firewalla LAN port negotiating with your TPLink at 100mbit right? if it is, we need to find the root cause of the negotiation part. (usually, the issue is electrical at the physical layer)

  A few more things

  1. Are the cables you changed same length as before? are they extra long? if possible change to a shorter one.

  2. Another way is to configure the Purple LAN port as WAN, and WAN port as LAN, and see if this will make any difference. 

   

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