SB8200

Hey, the modem keeps blinking orange and settings say 100mbps. If I reset it, it will blink green and say 1000mbps for a little while, but then eventually drop again. The cat 6 ethernet is fine. Xfinity says everything is good on their end. The modem is four years old, do you think it's starting to go?

My modem is sending information to the router but not allowing the router to the internet. I have tried this on 3 different routers, all different brands. 

New modem. Power ligh5 comes on, but no internet light comes on at all

I have an Xbox Series X and recently decided to hard wire from my SB8200 to the Xbox.Now it says it can’t connect to DHCP server. I have tried both ports on the modem, I even factory reset my network and still nothing.The Wifi works fine but for some reason the hard wire from the Xbox to modem won’t.What can I do to solve this?

My network shows my previous phone. I want to update the network to my latest phone model. How do I do this?

i am trying to add a  Verizon network extender to my home due to poor cell signal.  It was connected to my modem and will not initialize due to a “LAN/firewall” issue.  I called Verizon, I called my ISP and was advised to check my firewall settings in my modem.  I have no idea how to do this and what to do if I could find the firewall settings.  Any assitance would be appreciated.

We just hooked up teh Arris Surfboard modem. It is set up through our cable company but it is not showing up on the available wifi list.  

Ethernet port never stops blinking, even with no devices connected. Internet is working fine, but there's no way it's normal to flash 24/7. Just installed yesterday 

My SB8200 will no longer power on but it’s under warranty. How do I file a claim and exchange it for a replacement modem? Thank you.  

How do you tell if you have a SB8200 v2 Or V3?This does not workYou can determine if your Arris SB8200 is a V2 or V3 model by checking the tenth digit of the serial number located on the bottom label of the modem, or by looking at the backplate color and ethernet port color.Visual Method:      V3: The backplate will be grey with orange ethernet ports.   V2: The backplate will have green, blue, blue, and then red-ish color with silver ethernet ports.  Mine does not show any of this. The tenth digit is a 6 not 2 or 3Serial Number {edit : personal information} So I guess mine is 1 generationVisualIts not RED its PINK     

To preface I’ve only ever owned an Arris as far as I can remember and actively choose to buy them. Today I was in my living room browsing on my phone and lost internet which I attributed to Optimum because they are awful.I tried power cycling to no avail but notice when I do the lights all turn on simultaneously and stay on? I cannot reset it or cannot tell if anything happens. It won’t let me connect to the internet hard wired or through a router. I went through trouble shooting with Optimum and they saw no errors on their end. I tried a separate modem and 2 routers and they both can reach internet. I have no choice but to believe some reason this router died.Purchased from Best Buy in NY 11/29/23, I believe it’s under warranty but I no longer have the receipt. How should I proceed?

IntroductionFor starters, I live in an apartment complex that only has one ISP available (Cox). I purchased a SB8200 and a TP-Link ARCHER AX20 for the upgrade of service I was getting through cox. Number 1 Red Flag: The mobile app (SURFBoard Central).. I mean what a waste of time. This app serves no purpose other than showing you a email link to download a desktop app named “Fing” like who cares lol.Number 2 Red Flag: Upon reading the user manual, you can see the LED status screens on the front:USER MANUAL​​​​The plan for my internet is set to utilize DOCSIS 3.1, however the LEDs on the front all line up for 3.0. Troubleshooting:Obviously, restarted the modem

I called my provider and the firmware update failed. Is there another way to update the firmware. 

I don’t see Surfboard central app in Location Services to allow Surfboard central app to connect to my iphone

I tried going to the support site and entering my serial number, but it keeps saying “We were unable to locate your serial number”   I’ve only had the modem for a year and a few months. I need a way to contact to get a refund because it is supposed to have a 2 year warranty. I have tried all the trouble shooting tips I could find online. When its plugged in I only have the power light turn on and nothing else.

Just purchased this thing and trying to hook up.  I have internet but can’t navigate or ping 192.168.100.1  I am about to return this 

I’m in a three-way blame-shifting between Cox, Google(Nest router) and Arris. Two days ago we had an electrical power outage.  This apparently damaged my existing Motorola router.  A Cox technician came out and proved to my satisfaction that their network was working.  Working through his modem, I was able to connect my router to it and reach the internet from my computer.  That proved to me that the problem was the router. So I went and bought this Arris SB8200 at Best Buy yesterday and attempted to connect it.  The Arris was connected to the Internet through Cox.  I was able to connect to the Net through an ethernet connection to the modem.  But the modem would not allow the Google Nest to make a connection to the Internet through the modem.I will call tech support as soon as they open, but maybe someone here can help?Is there a way to talk to the modem through IP if I connect a computer to it via internet?

Here is a screenshot of my modem status right now.  What is going on with the OFDM PLC power level and SNR/MER?  Is that normal like my ISP says?  

I lost Internet connection. Unplugged it last night and when I plugged it back in last night all lights rapidly blinking intermittently. Tried reset and it did nothing. Unplugged it Woke up this morning, plugged it in, and now zero lights. Front or back.  About 2 years old and I think it's done?  

My sb8200 arrived today. I gave optimum tech support the mac and they say everything is set up and shows it should be working on their end. But it's not. The internet light flashes for a couple minutes then will go solid for about 30 seconds then it resets itself. I pulled the event log from the modem. Any one have any insight.23/02/2025 22:11:54 critical TFTP Request Retries exceeded, CM unable to register23/02/2025 22:11:54 critical TFTP failed - Request sent - No Response;CM-MAC=10:e1:77:71:01:f5;CMTS-MAC=00:01:5c:b4:c8:56;CM-QOS=1.1;CM-VER=3.1;23/02/2025 22:08:51 critical Config File Rejected due to Invalid or Unexpected TLV 11;CM-MAC=10:e1:77:71:01:f5;CMTS-MAC=00:01:5c:b4:c8:56;CM-QOS=1.1;CM-VER=3.1;23/02/2025 22:08:51 critical TLV-11 - Illegal Set operation failed;CM-MAC=10:e1:77:71:01:f5;CMTS-MAC=00:01:5c:b4:c8:56;CM-QOS=1.1;CM-VER=3.1;23/02/2025 22:08:48 error Primary lea

My 14mo old SB8200 has started dropping the internet a couple times a day in the past week.  I see in other posts that I should follow a procedure to check the cable power levels, to make sure that part is OK.  First step is to do a direct ethernet connection to my laptop.  I don’t have an ethernet port or an ethernet-USB adapter.  Is it essential?  Can it be done wirelessly?Probably unrelated, but my ISP (Cox) is in the middle of “upgrading” and say they will take me offline today for a few hours.  Might there related “fooling around” be causing my recent connection problems?

My SB8200 stopped working yesterday, the only light on is the power light, solid green, reset button does nothing. Is there a number to call? It is still under warranty until the end of March.[edit: removed image with personal information]

I just recently purchased a SB8200v3 and am already having an issue with it.  After contacting my ISP to have it added to my account I was able to get network activity, but the first octet of my default gateway is 24 instead of my ISP’s 192.  I need to plug in directly to my modem and manually change the default gateway in order to log into it locally.Does anyone have any thoughts how to get this issue sorted out if the ISP says it’s an issue I should take up with the manufacturer? Not being able to get my home network back up and running is a slight inconvenience.

I need a firmware update file for my SB8200.  I know it was mentioned to my ISP’s support line and they refused stating that they are not allowed to connect to customer owned modems and process updates.  At this point, I cannot update my modem and i’m having connection issues with reset connects and VPN drops which are impacting my ability to do my job. Can anything be done to get me an update file, please?

Sharing the results of 4 Astound “technician” visits w/r/t loss of 75% download speed , a broken Hitron modem, and a working useless Hitron replacement. Note that the Crackerjack Box Hitron modems rented from Astound come with a fixed subnet in their “default” ipAddress which is the equivalent to getting a ‘locked’ cell phone. It locks you into that subnet if you add the modem first, but ruins your LAN speeds and address-sifting if you add the modem to an already-existing LAN which uses a different subnet. Of course, deploying no ‘forward’-compatibility, the firmware web page does not allow the customer/admin to modify that ipAddress. That and any other “admin” functionality” does not even exist on their page. It’s called ‘authoritarian’, ant-user, and chiefly, “lame”. Naturally, with so many “default” user/pwd pairs floating around, none worked, esp. because there was no connection made.That presents issues for those avoiding the security and slow-down associated with ALL Wo