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Question

SBG8300 limiting speed to 60mbps after router mode

  • February 11, 2025
  • 2 replies
  • 46 views
R
The Many
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Today I switched my SBG8300 from the modem & router mode to WAN over ethernet mode - since I switched to fiber internet.

Unfortunately, the SBG8300 appears to be limiting my 1000mbps to 60mbps, both for ethernet and wifi.  

I tested running a cat6 cable directly to the fiber modem and I get the full 1000, but when I run it through the SBG8300 I only get 60.  I’ve restarted it several times and ensured all ethernet ports are set to 1000mbps.  Any solutions or settings I’m missing?

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2 replies

plemans
Juggernaut
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  • plemansJuggernaut
  • Juggernaut
  • 2214 replies
  • February 12, 2025

I’m surprised it works at all. Most modem/router combo devices are either a modem/router combo device, or just a modem. 

The guide says you need to use port 4 as wan for the sbg8300. Are you doing this? 

https://arris.my.salesforce-sites.com/consumers/articles/General_FAQs/SBG8300-Wi-Fi-Router-Mode

 

Current setup: Netgear CM3000-->Netgear RBE973S-->2.5gig tp-link switch, Xfinity 2.4gig/350mbps
R
The Many
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  • rycekkThe Many
  • Author
  • The Many
  • 1 reply
  • February 12, 2025

Yes, my fiber modem has a cat6 cable going into port 4 of the SBG8300.  The “WAN Interface Configuration” DOCSIS [Change] is missing from my Arris SURFboard, but the Hardware → Ethernet menu I can select “WAN Over Ethernet” check box, which I checked.

 

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