Modems

My modem is going slower than the speeds I paid for (90mbps down and 20 up instead of 1000 down and 40 up). From an AI search it probably needs a firmware update and is not being configured to make use of all the lanes available (my oversimplified version). Spectrum support seems to not know that they are responsible for updating the firmware. I’ve talked to 3-4 people via support and some said it’s not up to them and others said it would be done automatically. Is there anything else I can do on my end? I’m not a normal user and need the speeds for my small business.

I am not home in my modem needs to be reset what options do I have?

I have a brand new S34 modem and am using Xfinity 1.2 gig service. I have never seen download speeds over ~450 - 500mbps and have asked Xfinity support for help. They tried a few things, but the speeds still remain the same. Of course they said to bypass the router (Asus RT-AX88U) and plug directly into the modem which I did, but then the speeds drop down to ~90mbps both up and down! Going back to the router, they jump back up to ~500mbps. I would expect the exact opposite to happen. I am using Ookla speed test site both times. Can anyone offer some advice? Thanks!

I bought SURFboard s33v3 cable modem in June this year (2025). Initially was able to use port 2.5 GE connecting to Google mesh WIFI router and then from the ethernet port on the Google mesh to the 24-ports switch. All my computers and a few devices access internet with ethernet cables. Everything was working as expected for 2 months. One day suddenly internet dropped, I had to power off and power on the cable modem because port 2.5 GE was constantly flashing in yellow color. I have to switch to port 1 GE, it stays with solid green light. BUT everything slowing down now. The internet connecting through ethernet is very slow, 100MBS and takes long time to switch to a new web page. Any help would be greatly appreciated.

My SB8200 does not work. All lights are flashing rapidly. I tried a different power supply, outlet, coax cable, and resetting it with no luck. I think it’s dead. It should still be under warranty, but I cannot find the serial number on the website. Please help.

Hello, My Arris SB8200 modem no longer powers on (no lights, even with a known working outlet and power adapter), so I believe it has failed. I am looking to request a warranty replacement. However, when trying to verify the warranty for my modem with the online warranty tool, it says it cannot locate my serial number. The modem was purchased less than 2 years ago from Amazon. I can provide the serial number and order details upon request.

the Arris modem that comes with my AT&T Fiber will not properly handle port forwarding - at least not how I need it to work, so I was wondering if any Arris retail products might be compatible and yet have a more robust interface. Specifically I want traditional port forwarding that allows me to configure source port (or range) | destination IP | destination Port. NOT the “at&t way” where you configure the source port and then pick the destination from a list of names on the “gaming” panel. Would any Arris retail products have this capability?

The model I am using is the Arris Surfboard S34. I have both a desktop computer and a WiFi router. I want to connect the router into the 2.5 Gig port and the computer into the 1 Gig port. However, it appears that only one or the other works. If I have the computer plugged into the 1 Gig port, the router does not connect to the internet. If I have the router connected to the 2.5 Gig port, then the computer does not connect. How can I solve the issue so that both can connect?

I'm replacing my Xfinity modem with an S33. I can get my Deco Tp link wifi to work but ethernet ports from my devices do not see the internet. When I get the ethernet ports to work the deco tp link will not work? Im running my house throught a 24 port patch panel into a 24 port unmanaged netgear switch. However when I go back to the modem from xfinity I can get both to work with no issue. Any help would be appreciated.

I have a new SB8200 that I connected to Spectrum. When I connect my PC to the ethernet port I have access to the internet, but I cannot connect my router to the second port. When I do it does not indicate internet access. If I remove the PC and reboot the modem then the router gets access to the internet but as soon as I plug in the PC the PC can’t get access. What am I doing wrong?

A few months ago I upgraded my cable modem from a SB6183 to an S34, and soon after I started noticing intermittent dropouts, 3-4 times per day, such as during Google Meet video chats and in my SSH connections to hosts outside my network. I switched back to the SB6183 for a few months to avoid thinking about the problem, and during that time we did not notice the intermittent dropouts. But, the S34 is supposed to be a more fully-featured modem and capable of higher speeds so I switched back trying to make it work, and I’ve resolved to collect data from the modem after such an event happens. Within the last year, I called out a Spectrum tech and got a new drop from the pole outside my house. The drop routes through a single splitter to reduce the power levels slightly and then into the cable modem. The daily intermittent dropouts continue. When these intermittent drops occur, I notice that I’m still able to connect to the web portal on the modem on my network, i.e. 192.168.100.1, so I’m

My connection randomly keeps shutting off. I use a w21 arris modem with a surfboard model sb8200. I have tried hard resetting it, unplugging both for 5-10 minutes, I have tried moving the router around the house. To no avail. It used to work great, now we can hardly stay on the internet for more than 5 minutes at a time. Is there any solution to this?

I just increased my internet speed to 3000megabytes per second. What is the best Arris modem to update to my new speed

I forgot the password to my device settings. Can't reset it. Or register it.

My modem is receiving internet from Xfinity but unable to connect to an Orbi router. Upon speaking with a technician at Xfinity they told me it was a manufacturer issue with the modem

My Arris 33 is disconnected a few days ago. I’ve tried a hard reboot. It won’t come back on. There’s nothing wrong with our service provider. We’ve already checked there help

Are these guys still in business? All phone numbers are disconnected

Try to reset the admin password on this device. I have tried every suggestion there is and nothing works in this company because they have no customer service on the weekends. I’ve had nothing. It’s a piece of shit.

I am trying to connect several households items to my internet. It has been stated that I need to use a 2.4(not sure exactly what that means). After calling my internet company, they stated that I needed to reach out to the manufacturer of modem/router.

I need help changing the modem password, but the app doesn't work.

Hello, Can you please let me know the status of the below order ? I have not received any status email from the Surfboad. Thank you. Your order number is 61137 - ARRIS G34 3.1 Modem with AX3000 WiFi Router Selvam

Today I replaced my Spectrum Modem with a new S34. and had Spectrum activate it. Hooked to my laptop I get an IP and all works well, but hooked to the new Asus ZenWiFi BE5000 I get no IP. Hooked to an old Ubiquity UDM it works perfect so for the moment my client lives with the UDM. Took the ZenWiFi home and plug it in my network and it comes up and works perfectly so I know the router can accept an IP and the Modem can supply an IP, but why can’t the two new boxes work together. The Spectrum Tech claimed that the modem was not showing that the ZenWiFi was showing as plugged in when I plugged it in. Background, the Spectrum modem had been with fine with a TPLink WIFI 5 modem for a couple of years but apparently also stopped getting IPs yesterday, Which is why we started replacing stuff.

I cannot see the new modem on spectrum website. Is an activation from spectrum required?

What can I do to stop my modem from overheating? There’s no dust in it and it’s in an open area. I’ve never had this happen to me before.

Hi, I would like to ask if the SB8200A modem is in any way compatible with the SB8200B modem. The 8200A is supposed to use 6 MHz channels, while the 8200B should use 8 MHz channels. Is it enough to just flash the firmware, or is it a different hardware altogether, meaning you can’t turn an 8200A modem into an 8200B? Thank you for your answer.