SB8200

Bought the SB8200 3 months ago, but didn’t actually provision it with Xfinity until 2 weeks ago.  I only have 13 devices needing Internet access through my router.  A few days ago, all my devices would drop their Internet connection for a min or two, then it would restore connectivity.  However, after this last instance of dropped connectivity, service never restored.  Xfinity can see the modem and can restart the modem remotely, but router never sees the connection to the modem.  After trying with a spare router and getting the same results, nothing left to conclude except the SB8200 is not passing the IP address from Xfinity to the router OR the WAN port on the SB8200 has completely failed.  I bought a new router (not a Arris modem!), provisioned the new modem with Xfinity, and voilà, the router is now working perfectly with my new modem and all my devices are reconnected to the Internet.  Looks like I wasted my $s in purchasing the SB8200.

Since October of 2023 my download speed would drop to 30 Mbps like every week or month and stay there until I power cycle the modem. I am on a 250 down and 25 up plan with COX. This happens wireless, wired and pc connected directly modem. Service has been working fine since COX ran the line 6 years ago, line goes from outside directly into the modem, no splitters. COX came out looked at the line, did some cleanup at the box and said line is fine and it still happens. I read online that this is indication that modem is going into partial service mode because of bad levels. I have Modem status and logs before and after the power cycle saved in PDF and I can post them here. i just need to figure out if this is the modem or the line.

I purchased the wrong modem by mistake can I return it for a refund  order #59472 I have already purchased the right from you.

My problem is that I purchased a SB8200 by mistake on 5/8/24 couldn't stop the purchase in time so I purchased the right one the SVG2482AC on 5/10/24 I received the 8200 today 5/15/24 can I return the 8200 for a refund I haven't received the other one yet.

I recently purchased a SB8200 modem. upgrading from a SB6183. I live in a very poor cell reception area. Without Wi-Fi calling I would be in trouble. Hence my problem trying to activate the new modem when I need to disconnect the old one, no service then. My original modem I think I had to activate from my previous address then bring here, can’t do that now. any suggestions?

I am having trouble activating my SB2800 modem. I downloaded the Surfboard app as suggested but once I opened the app, it said it only applied to certain products. The system seemed to allow you to search for another product but I never got the product list. So I am stuck.  Is it better to just go through my internet provider?

I purchased a new SB8200 (and TP-Link router) to replace a COX Panoramic combo modem/router that I was renting.  I have one problem:  the SB8200 will not reconnect when power cycled.   Specifically, unplugged, then plugged back in.  The send and receive lights will go solid green, but the online light just blinks.   Eventually (minutes), the modem appears to restart and the lights cycle through startup phases, resulting in the same status described above.   It seems like the modem will do this forever (I give up after 30 minutes).   Using the management webpage, it appears each reset cycle is using an different set of channels to attempt the connection.I only way I’ve discovered to get the SB8200 to connect is to leave it unpowered for several minutes (like 10), then plug it in.   Only then will it successfully establish a connection.I’ve validated that all signals levels are good (per the SB8200: CABLE SIGNAL LEVELS FAQ).   I’ve had COX at my house, and they’ve

I purchased an SB8200 to connect to Optimum after having them scan the MAC address at their local office the modem will not connect.  The power light is green downstream and upstream lights stay solid greed and internet light flashes green.    This stays this way for several minutes then the internet turns solid green for maybe 5 seconds then all lights except power go out and the process repeats.  I have had them reflash the service, confirmed the MAC address and even changed my service coax cable.    I had this issue about 1-2 years ago when I upgraded a modem at another location and after much ado it was resolved but I don’t remember how it was resolved.  I really feel this is an optimum side issue but any advice would be appreciated.  

Hello,I have been having internet issues for a couple weeks, it will randomly drop for less than a couple minutes and come back, there is zero consistency on when it happens. Just enough time to get kicked from a game, for my phone to reject the wifi, etc. Cox is basically no help and just tells me to buy a new modem with zero reasoning as to why, they just want my to buy their hardware and I refuse. My modem is about 4 ½ years old. These are the logs I got from event log today after my internet cut out, do they show anything? 6/5/202417:58:43    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=*;CMTS-MAC=*;CM-QOS=1.1;CM-VER=3.1;6/5/202417:58:43    3    Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=*;CMTS-MAC=*;CM-QOS=1.1;CM-VER=3.1;6/5/202417:58:43    3    16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=*;CMTS-MAC=*;CM-Q

If DECO router is connected to Ethernet port 1, will port 2 be ok to connect to my WD external drive?

When signing into the web manager tool for my SB8200 cable modem, it responds to both 192.168.111.1 and 192.168.0.1. This causes a problem for me in that a router in my network can only be managed using 192.168.0.1 and when that is entered, it only goes to the Arris login screen. I cannot get to the router no matter how I’ve tried.Can I, as an end user, somehow delete the 192.168.0.1 IP address from my SB8200?

Hello, Yesterday afternoon my internet cut out and I have been unable to restore it. I checked with my ISP and they aren’t showing any outages in my area, and tried resetting my network on their end but are unable to communicate with my modem. The upstream light on my SB8200 consistently blinks despite resets and factory resets. I logged on to my Connection pages and Event Logs.On my connection page it shows Acquire Downstream Channel-813000000 Hz -LockedConnectivity State-In Progress- Upstream Parameters AcquiredBoot State-In Progress-UnknownConfiguration File-In Progress-Security-Failed-BPI+DOCSIS Network Access Enabled-Denied  My downstream and upstream bonded channels seem to have proper power and SNR outputs.On my Event Log Event Level 3 with description “No ranging response received - T3 time-out”Event level 5 with description “B-INIT-RNG Failure - Retries exceeded” Thank you for

Cannot get DOCSIS 3.1 running on my new sb8200. Lights on the front always are green. Checked the event log and there are critical error saying the config file will not load.Have xFinity coming out on Wed. but don’t think they’ll be able to fix it unless the tech is aware of this issue and there is a fix.From what I’ve read others had this same problem - wondering how it got fixed so they get full speed and take advantage of DOCSIS 3.1.

Bought my modem jan11 2023 and the auto check said the warranty expired oct23. The customer service office is closed for some reason.

Problems with my SB8200 Modem (purchased 06/11/2023), I can no longer restart my modem without restarting it many times to get it to work. I have what is called a net reset device NetReset that would automatically restart my Modem and router everyday but can no longer restart the modem unless I restart it many times to get it to work.If you restart it or the power goes out it will reboot like normal with the 4 lights on the front all on solid when booted up from the top down Solid Green, Solid Blue, Solid green, and solid green and the light on the back will be blinking green like the internet is working but router tells me connected but no internet, even if you connect a computer or laptop directly to the modem it tells you the same thing connected but no internet.So then I have to restart the modem and

Hi, I recently bought a second hand SB8200 and went to the events log at the web interface and noticed there's a constant 'FW update initiated' followed by a 'FW update failed due to incompatibility' every time I either reset the modem or every few hours or so. I'm aware I'm way behind in FW updates and that my ISP is supposed to update it, but for some reason it can't or it won't take it. I've talked with Xfinity agent through both their app and Reddit, the first telling me that they couldn't see the modem as online and the latter saying that the update Arris provided to them is not good and that this modem has a lot of problems with many ISPs so they couldn't do anything until Arris fixed it. I'm trying to get it updated cause from time to time I lose internet connection and apparently it's because it's trying to update itself but because it doesn't work, it resets briefly, enough to ruin games or streaming, and sometimes connection slows down permanently, needing a modem reset. I

Where do I find the Network and password to sign in on my computer?  It’s not on the bottom of my modem.

I just bought an SB8200 and in addition to having issues with connecting to Xfinity during peak hours (still don’t have an answer on that from Arris or Xfinity) I am trying to download Fing.  When I go through the initial set up where it says it’s sending an email to download and set up, the email never arrives. Any suggestions?

I’d like to open some ports to my arris surfboard router?How do I do this?Thanks

Hi SB modem community! Does anyone know what is the latest hardware version available for the SB8200 cable modem? I have a version 3. Regards,,mbroberson

I got connected with xfinity with my SB8200v3 and I used 1 ethernet port to connect a switch to. I have 3 PCs connected to the switch but only 1 is getting internet. I tried looking into the setting of the modem and the app but neither one will give me any options. I have been trying to look this up and can’t figure out anything other than I might be in bridge mode but can’t figure out how to get out of bridge mode if I am.

Where is the advanced tab??? theres no way to turn on the link aggregation thats the whole point of buying this modem to get 2 Gbps speeds. 

I just recently purchased an SB8200 and it will not connect to optimum, I’ve had a tech out and he was able to connect one of their modems to the network but couldn’t get my modem to connect.  Phone call with support also was unhelpful as they said they don’t know why it won’t activate and they said to reach out to Arris.  It just gets stuck on solid UP/DOWN lights and flashing connecting and than cycles that forever.  Below is the event viewer from the last time they tried to activate the modem.14/04/2024 02:14:18    notice    GUI Login Status - Login Sucess from LAN interface; client ip=[192.168.100.20];CM-MAC=8c:76:3f:fc:ce:7b;CMTS-MAC=00:01:5c:c0:04:4a;CM-QOS=1.1;CM-VER=3.1;14/04/2024 02:14:08    notice    GUI Login Status - Login Fail from LAN interface; client ip=[192.168.100.20];CM-MAC=8c:76:3f:fc:ce:7b;CMTS-MAC=00:01:5c:c0:04:4a;CM-QOS=1.1;CM-VER=3.1;14/04/2024 02:14:03    critical    Config File Rejected due to Invalid or Unexpected TLV 11;CM-MAC=8c:76:3f

Modem is lit solid green, but tv, phones, laptops not  connecting wirelessApp is showing error message for registration, and also says connect to WiFi with Ethernet cable 

Connected to internet but WiFi with Linksys router not working…no WiFi