SB8200

After an outage in my town my internet stop working. Contacted my ISP and they told me in their end everything looked good. My modem used to display a green steady light for power, a steady blue for receive, another steady blue for send and a green for online. Now the order is green, blue, green, and green. I have no internet access after multiple tries to reset, disconnect the power source and rebooting on ISP side. What else can I do to fix this?

I just purchased the SB8200. I can access the page listed on the quickstart guide as: 192.168.100.1 which gives me access to view “status” of the modem, however, I cannot access the device management page that will allow me to change settings. I’ve activated with my ISP and this service will be a secondary internet and I need to set the modem to bridge mode. I’ve connected a cable directly to the modem (not going through my router to get to it) so I should be able to get to this web page. I’ve also tried 192.168.0.1 but it brings up the same status page as did the other IP. Is there some secret sauce I’m missing on this ? EDIT to add: The IP address on the modem is the WAN IP so when I connect my computer it I’m getting a 42.x.x.x IP versus a 192.x.x.x IP

I have a new SB8200 on Optimum 300 Mb cable internet. The modem is connected directly to the Optimum-provided cable in house, about a 10ft run to outdoor cable connection.There are no other devices bridging the cable. Internet only. In looking at the Downstream Bonded Channels page on the webmanager, I see many thousands of Corrected & Uncorrectable errors on every channel. Generally 4000- 5,500 on each. Ch 33 shows 9,130,017 Corrected! All channels are locked and show power of between 8.9dBmV to 11.8. I do not notice any dropouts in service (streaming audio and video services) and my service for web seems steady, although not blazing. This is many more errors than I’ve seen when others post. Is there a service problem?

Bought an SB8200 cable modem from Amazon to replace an old SB6141. Package appeared to be sealed and modem was wrapped in plastic. Activated successfully with my Xfinity account. Functionally, it seems to be okay. Speedtest.net reports no change in speed; ~80Mbps down and 5 up. My Xfinity service is supposed to be 400/5 and I was hoping that a newer cable modem would bump my speed up. However that’s not why I’m posting this. I cannot access the Web Manager page at the default IP of 192.168.100.1. The previous SB6141 had the same address and I had no problems viewing the page. I’m using Firefox 91.13.0esr (64 bit) but have also tried Chrome. Tried both http:// and https:// and nothing. I’ve tried the usual power off-power on routine with no change. I CAN ping 192.168.100.1 and see it. Remove the ethernet cable from the SB8200 and ping fails so I’m pretty certain there’s no other device at 192.168.100.1 on my network (192.168.x.x). Ethernet cable from SB8200 goes to my ASUS RT-N66U wirel

I can’t get past first step (select device) on the app. Click next and nothing happens.

I’ve had this modem for a couple years with Xfinity and so far no issues to report. Recently, I’ve been getting emails from Xfinity that I need to upgrade my modem to match the speeds I have. I’m on a 1200 Mbps service plan. I thought that was strange as the box this modem comes in states download speeds up to 10Gbps. Xfinity tells me that this modem only supports 1Gbps. I looked on Arris’s website and now I see that the information appears to have changed. What am I missing? Does this modem not support above 1Gbps now? I bought this thinking I was future proofing but it appears that I was wrong. Appreciate the help correcting my thinking.

I recently install and SB 8200 Modem and every devise that I have had no problem getting internet connectivity on every device except my Honeywell Gateway. I use a Netgear switch. Working with the Honeywell team they are convinced that there is something preventing their gateway from connecting to the modem. They sent me the email below in an attempt to do some trouble shooting: I am sending you some network recommendations that might cause that your thermostat can't connect to your home network. You may your ISP (Internet Service Provider) and check the next settings. 2.4Ghz, or 5GHz network. The TH9585WF will only connect to the 2.4GHz. Enterprise Business Networks requiring RAS, Guest networks, or networks requiring Web Portal authentication are not supported. Recommended WPA2-AES Network Security Protocol (Also known as WPA2-personal, or WPA2-PSK) are the primary industry standard Wi-Fi connection Configuration. WPA3 is not supported by our devices. We do not recommend any use of W

SB8200 hardware version 4 is not attempting to update firmware after activating with Spectrum. I need the update so that I can enable link aggregation. I used the Spectrum live chat feature and the agent told me they won't push an update because it's 3rd party hardware even though it's on their approved device list. I tried a reset to see if that would make a difference, but no. I'm including a copy of the event log from after the reset, in case that is any help.

Just installed an SB 8200 and I want to make sure I have the maximum network security that this device will supply. How do I check/adjust the security settings?

if it is not is it a problem? when or if will Comcast usual do an update? I just got it in today.. so far so good. I did have problems with the default login 3 or 4 tries and it finally worked with the last 8 digits of the serial number. Information Standard Specification Compliant Docsis 3.1 Hardware Version 6 Software Version AB01.02.053.05_051921_193.0A.NSH

My SB8200 modem is only connecting with Docsys 3.0 (Green) on upstream. The downstream is blue however. Any thoughts on what is causing this?

Comcast said the first time our netgear modem may be too old, even though it was a docsis 3.1. We got a motorola a few days later and had the same issues. They came back a few weeks later and replaced the old rg58 drop (they should have done that a long time ago) and ran a new cable from the pole all the way to the modem outlet. Signal improved, dropouts slightly improved but still goes out for minutes to an hour. A week later they came back again, replaced a port on the pole and adjusted the DB down a little. But didn’t make any difference. On the comcast board someone said that motorola may have a firmware issue causing all the errors on the OFDM channel. So we got the SB8200 and this one too is having dropouts and the log is full of errors. Comcast says everything looks fine on their end. It’s doubtful we had 3 bad modems in a row. All these errors are just from just 2 hours of uptime and we are loosing connection every 5 minutes now.

Below is the Status report and Event Log for new install of an SB8200 Modem with the Surfboard 2 tower wifi 6 mesh system added on. I’ve had problems with weak or briefly dropping internet along with event log timeouts with old Netgear modem for a long time also. can Someone interpret this and see if this would indicate a problem with the 35 year old coaxial cable underground from old Comcast now Xfinity ? Connection The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem. Startup ProcedureProcedure Status CommentAcquire Downstream Channel 423000000 Hz LockedConnectivity State OK OperationalBoot State OK OperationalConfiguration File OK Security Enabled BPI+DOCSIS Network Access Enabled Allowed Downstream Bonded ChannelsChannel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables4 Locked QAM256 423000000 Hz 1.5 dBmV 42.4 dB 1402 13521 Locked QAM256 405000000 Hz 3.3 dBmV 43.

I have a SB8200 surfboard modem. Trying to connect my LG tv to the wifi but do not know how to find the password. I’ve looked on the bottom of the modem and tried everything there but nothing works. The other thing that is strange is that the tv and my computer call the a MOTOF512...and not an Arris surfboard. Maybe Motorola used to own Arris or something. I don’t know. Any assistance here would be greatly appreciated!

I am having an issue with something eating my allowed data for the month. I have never been over before and I am now over by more that 200GB. through the process of trying to track stuff down I can across the error log and I am curious as to what all this means. (edit: CM-MAC information removed) 11/24/2022 14:23 2436694061 5 "Dynamic Range Window violation" 11/24/2022 14:23 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=00:90:f0:41:00:00;CM-QOS=1.1;CM-VER=3.1;" 11/24/2022 10:18 2436694061 5 "Dynamic Range Window violation" 11/24/2022 10:18 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=00:90:f0:41:00:00;CM-QOS=1.1;CM-VER=3.1;" 11/22/2022 01:04 69010800 4 "SW upgrade Failed after download - SW File corruption" 11/22/2022 01:04 69020100 4 "Improper Code File Controls" 11/22/2022 01:04 69010200 6 "SW Download INIT - Via Config file d1

I contacted Arris for support and pointed out an issue with the log file and they failed to acknowledge a problem. They had me reset it. The problem repeats. The log can easily get overloaded and fail to allow you to log in and get the reports. So I need the logs. I am having problems both with my internet provider at the same time. I have been online and on the phone with them. I have had the cable repairman out. The cable repairman insists that the input power levels are sufficient and that if he increases them the reflections it will cause too much noise. I used this forum as well. I noticed the modem would report that it had issues with updating software when it was started up. And what help did I get from this forum? Now I get a message they have closed out my topic and lists it solved. I have two big companies pointing their fingers at each other and I am stuck in the middle. I have spent 40 hours of effort trying to solve this issue. A bit frustrated. Buying a modem or choosing

Hi! I’ll start with my first question. Does the CM8200 support LAG(LACP)? and also I can’t access my web interface on my SB8200 from a 192.168.0.0/24 network, is this a known bug? It’s not shutdown in the config file. What is the current version of firmware on DigialCM? My ISP (Midco) seems to think that two year old firmware is up to date.

11/02/2022 08:27 69010600 4 "SW upgrade Failed before download - TFTP Max Retry Exceeded" It would seem there is an issue

New Surfboard 8200 User. I can access the WebManager fine with a computer plugged directly in. Should I also be able to access it when the computer is going through my switch>router>modem? It doesn’t connect for me.

So my original problem was that my internet connection was dropping (Xfinity) so we scheduled a tech to come out for a fix. The initial issue was resolved because it turned out that the line was damaged and the house we moved into had multiple splitters that were causing our signal to "leak" he mentioned that he was surprised that we had a connection at all from how bad it was, he disabled all the other Coax outlets that weren't in use and our issues were fixed for that day. I should note that Prior to this visit we had our Arris SB8200 modem's lights as Blue for downstream. (speeds are 600+mbs Down and 30mbs Up) After his visit the internet went down that night only to return in the morning but the lights on the Modem turned all Green and occasionally flicker (and have remained green) but occasionally it turns Blue for downstream for about 5-10 seconds whilst the connection drops only to return to green again. For ex. any stream/Netflix video/Game that is running will cut out for that

Have a new SB8200 I can log in but as soon as I select any option it goes back to the login screen. I can’t see logs or get to help.. Please help or I will have to return it to the store

My Internet goes down pretty much the same time every night and comes back on around the same time every morning. Usually it'll go down anywhere from 3 o'clock to 5 o'clock in the morning and then it'll come back up around 8 o'clock in the morning almost on the dot every day. I've talked to our Internet technician probably 20 times over the past three weeks and they have even come out to the house and they cannot find anything wrong. All they keep saying is that I should rent a modem from them which I do not want to because I just recently sb8200 for almost $150. By the time the tech even comes out of course the net is back online. I really do not know what to do. I noticed something weird in the event logs, that is goes back to 1970 on the log time/date. I honestly do not even know what to do at this point, I thought about buying a new modem to see if that even will help and I guess I could always rent one from my Internet company but I feel like since my Internet works 90% of the day

Looking for wifi extender that will maximize my 500GB signal

I currently have the SB8200 modem that I bought back in 2017. I was looking around at modems to see if I need to upgrade to a newer model and I see that DOCSIS 3.1 is still the top of the line, so I should still be good for a while. However, I saw that the Motorola MB8611 advertises that their modem has Active Queue Management (AQM). I can’t find any reference to AQM on the Arris site, but I did find that it is part of the DOCSIS 3.1 spec. Is this just a case of Motorola listing a feature that every DOCSIS 3.1 compliant modem has, or does Arris not have AQM in the SB8200?

Purchased new SB8200 in February and installed and activated it per Comcast and Arris instructions. Had new Linksys MR9600 router already installed and operating. Had no trouble for a few weeks and for 3 months now recurring crashes and DOCSIS 3.1 dropped to DOCSIS 3.0. However, the DOCSIS chipset remains online to Comcast and they show the modem and system still up and operating with no indication or record of outages from their viewpoint. Had 5 Comcast technician onsite inspections and nobody has the answer. Currently have a borrowed Comcast Xfinity modem in place and absolutely no outages, slow downs, or connection issues which is at least circumstantial evidence that the Arris SB8200 modem is faulty. Rebooting resumes internet connection and service but only briefly before another crash. I do not know whether SB8200 is incorrectly configured but I changed nothing after taking it out of the box and would not know how anyway. If there is a solution I would be interested in being poin