SB8200

had a zfinity technician rule out the splitter, coax cable, and ethernet cable a possible cause, down to being the modem itself causing the problem. what could be the reason for this failure. also i am hard wired to it (no router in between). could it be a hardware failure on the inside of the pcb board? if so which component that i may de sauder and re sauder. 5 repliesOldest first  plemans  24 days ago log into the computer you have connected and see if your actually connected at a gigabit rate. I’ve seen sketchy cables, ports, pc’s that only connect at 10/100mbps and limit speeds. Current setup: Arris G54-->Netgear RBE973S-->2.5gig tp-link switch, Xfinity 1.4gig/200mbps

Hey guys, I've been having issues with my internet and I'm not really sure where to begin, though I suspect that the issue is with my modem. I'm skeptical because even before I bought it I was having issues with my internet where it would randomly drop and I had to reset it a couple of times before it would come up. I bought the sb8200 3.1 and paired it with a netgear orbi sxk80. It works very well most of the times but there would be like an instance or 2 a day where the internet would drop for like 10 minutes or so and go back to normal. These past 2 months it's gotten progressively worse and the past 3 days have been pretty rough. My orbi tells me when it goes offline and it has notified me of 30+ times in the past 3 days. That is also not including the times where it drops for a couple seconds and comes back.The reason that I think it might be the modem is that when it happens I unplug/plug it and it comes back fine most of the times. I know there's the whole att t

Just purchased the SB8200 and spent over 2 hours on chat with xfinity. They say everything is perfect on their end. Yet my surfboard has 1 blue light on. Any help would be appreciated 

My SB8200 is showing all green middle lights indicating its running in DOCSIS 3.0. I called Optimum and they said it should be running in DOCSIS 3.1 with my 1 gig plan. Please see the connection log to see if there are any issues. I was using Optimums modem, but it rebooted multiple several times per day. I no longer have that issue with the 8200.ConnectionThe 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            429000000 Hz LockedConnectivity State       OK       OperationalBoot State       OK       OperationalConfiguration File       OK      Security           Enabled           BPI+DOCSIS Network Access Enabled        AllowedDownstream Bonded ChannelsChannel ID      Lock Status      Modulation     Frequency        P

had a zfinity technician rule out the splitter, coax cable, and ethernet cable a possible cause, down to being the modem itself causing the problem. what could be the reason for this failure. also i am hard wired to it (no router in between). could it be a hardware failure on the inside of the pcb board? if so which component that i may de sauder and re sauder. 5 repliesOldest first  plemans  24 days ago log into the computer you have connected and see if your actually connected at a gigabit rate. I’ve seen sketchy cables, ports, pc’s that only connect at 10/100mbps and limit speeds. Current setup: Arris G54-->Netgear RBE973S-->2.5gig tp-link switch, Xfinity 1.4gig/200mbps

Hello everyone ,Today, I purchased a used (preowned) cable modem, specifically the SB8200 model. Upon exploring its Event Log, I noticed several recurring issues related to synchronization and ranging failures, such as:1-SYNC Timing Synchronization failure.2-No Ranging Response received.3-Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received.4-Started Unicast Maintenance Ranging - No Response received.5-16 consecutive T3 timeouts while trying to range on upstream channel 8.6- Unicast Maintenance Ranging attempted - No response - Retries exhausted. Could someone please help me understand what these event logs mean? Do they indicate a problem with the device? Would it be advisable to return it, or are these issues not significant?Thank you in advance for your assistance.

I have an SB8200 modem. Currently, my modem is plugged into my Vonage phone modem, and my phone modem is connected into my Netgear Wifi router. I want to connect my SB8200 directly into my Netgear router and use one of the ports on the router to supply my Vonage modem. I tried this setup; however, I cannot get the Netgear router to recognize the SB8200 modem; i.e. I get no connection into the router.

Is it necessary to update any firmware on theSB8200 modem?

https://imgur.com/a/jqy8wznImage files of the modem status in the link above.Tech came in, put a simple continuity tester on the barrel connector in basement and declared I have a bad router. I insisted the router is fine (it's a couple year-old Asus RT-AX86U).So then he did some actual testing on the outside line and said all is good. But he did change out an attenuator where the line comes into the basement, is barreled together, and runs directly to my modem. He said it was the wrong attenuator for the service.I have whatever the top package is... gigaspeed or something like that.When I first had an issue last night, I was getting 800 download speed, and only 1.5 upload. Although today when I checked, before he came, I was getting 800 and 40. After he left I am getting 670 and 11.His contention is that the modem is fluctuating and needs to be

I’m trying to get a SIP circuit to register, but the SB8200 (used with Xfinity) is blocking something. When I switch to my AT&T circuit, the SIP comes up just fine. Is there a manual for this device? I can’t seem to find one.

I bought a new unit and on first plug in I see the second blue light on, the other 3 are not lit. What does the 2nd blue light mean? 

Sb8200 been running nearly a year and it's decided to not connect to the internet, won't connect to the configuration page either via ethernet direct connection.  Is there an update out there or is this thing simply broken? Any help here appreciated

Hi Team,I am totally new to this and not a tech savy person.I was able to open the web page, 192.168.100.1, But i cannot login using the default password.Is there anyway to reset the admin password?Also once we login into the web page can we update the firmware?Can we get to know the connection statistics?

Whrn i open the app and click the “network” tab it just apins and never loads.   Should i delete app and reinstall?

My arris sb8200 stopped working this morning.  Any ideas? All the light cycle through and flash. 

I was hoping to setup 2 routers on a newly purchased SB8200 modem. I had one router configured as 192.168.1.0/24 and the other as 192.168.2.0/24I have been Googling but am stumped. I was hoping to have 2 isolated networks - if it’s possible.If there’s a KB floating around, or if anyone has some guidance, I would sure appreciate it any help.Thank you, and my apologies for a rookie question.

Where is the SSID number for a new modem? 

I am trying to setup my ARRIS modem MODEL SB8200. Xfinity has done everything on their end and can confirm there is a strong signal, however I am not seeing the modem in my network to login. Please advise...

My sb8200 has 2 internet ports. The #1 connects laptop to modem. It flashes orange. 2 connects my router to the modem. It flashes green. Shouldn’t both be flashing green?

I had an incompetent Xfinity tech tell me srros needs to reconfigure my modem cause it’s in bridge mode..After all that I realized he didn’t have me hook up my router and he was wondering why my wi fi wasn’t showing up anywhere..

does anyone know if Arris has pushed out any security updates for all their modems as per the recent FBI announcement that deals with Chinese hackers targeting personal modems and installing virus / bots ? I have an SB8200 Surfboard cable modem i am concerned about

The power light keeps blinking and non of the other lights are no. How can I fix it? I purchased the unit on 11/28/2023. 

I cant access my routers web manager every way I try to get it google just fails and says ERR_CONNECTION_TIMED_OUT

Not sure if this is an isp issue, a modem issue, or an issue w my signal levels.im sure my isp - optimum - will blame me for not using their equipment,it seems like its could be an issue w my cable modem? Ive seen about 4-6 posts with seemingly similar issues. I also have the issue where you can not access the modem gui management page.i’ve been at the same location for 7yrs, had optimum residential cable, business cable, and now switched back to residential service for better price and 1gig service. This issue is new since replacing my old docsis 3.0 sb cable modem + router to the sb8200 + 2 different routers that both have the same issue.equipment is this - sb8200 -> router/firewall → switch → ap/ethernet.at least once a day my router loses the internet connection for about 10m. all the lights on the modem indicate that it is connected as normal. I suspect this is related to the isp dynamic address updatingif i p

I just updated from an old SB6121 to an SB8200. The internet is way slower from before. I checked the status page and it looks like all my power ratings are out of the norms. Any way I can correct this?