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SB8200

DOCSIS® 3.1 Cable Modem

  • 520 Topics
  • 1,358 Replies
520 Topics
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The Many
miklcThe Many
asked in SB8200
SB8200 Blue light - No internet

My provider Mediacom has provisioned my new SB8200 but it has only the 1 blue download light lit, shouldnt all lights be on??  Also I can not connect to my netgear gigabit switch ….. 

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Wi-Fi Warriors
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The Many
Tculbert8The Many
asked in SB8200
How to OPEN UDP Ports 500, 123 , 4500 on Arris SB8200

I am trying to connect my T-mobile cell spot and it says I need to open Ports 500, 123 & 4500. How do i do this? I have the Arris SB8200.

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Wi-Fi Warriors
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The Many
GonzoHardingThe Many
asked in SB8200
SB8200 wont stay connected with Xfinity provider

My provider uses Xfinity and they say that the modem has issues on their end they say it is connecting and then drops it over and over...the modem is pretty much brand new...I refuse to believe it is unable to push the small town providers 1 gig speeds I know it's not the WiFi router cuz Ethernet from modem straight to my laptop is still not connecting...anyone know what my issue may be? And yes it's been provisioned to the provider this issue just started tonight

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Wi-Fi Warriors
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The Many
truesnickThe Many
asked in SB8200
How to enable bridge mode on SB8200

How can i enable Bridge Mode on my SB8200 on my PC and not my phone? I do not have access to wifi at the moment and the mobile app has no way to connect to the modem My issue is that my router is not getting internet from my modem - but ive confirmed that the modem is getting internet, as I am hardwired to it and connected to my ISP, Cox

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Wi-Fi Warriors
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The Many
denis9834The Many
asked in SB8200
Slow/intermittent internet connection on Sb8200

I have sb8200 with COX in Phoenix, and I have exactly same thing happening, started about 2 month ago and it would drop to 30 mbps every week or so, cox came out checked the line and said it was good.

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Wi-Fi Warriors
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The Many
Donkerm86The Many
asked in SB8200
sb8200 wont connect to router

My modem will not provide internet access to either of the two Wi-Fi routers I have tried. The lan cable works with my ps5 so I know internet is coming to the modem. I have netgear routers. I have reset all of them and turned off and turned on all of them. Any other ideas?

2011
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Wi-Fi Warriors
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The Many
Gado0002The Many
asked in SB8200
change password/username on SB8200

I need to set my password/username for the sb8200 modem. I do not have original password/username, and also did a factory reset. But do not know how to change it. Please help. Thanks.

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Wi-Fi Warriors
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The Many
AbbyKayThe Many
asked in SB8200
Where do I find the SB8200 Manual

I do not understand this modem and am looking for the user manual. Where is it? 

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SonleachThe Many
asked in SB8200
WIFI not connected in any devices - SB8200

I have everything set up and connected but I can’t find my wifi on the wifi part on my phone to connect 

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Wi-Fi Warriors
ChargerGeek22
The Many
ChargerGeek22The Many
asked in SB8200
Arris SB 8200 Mediacom 1Gb plan

  I just recently purchased the SB8200 because the modem that i was renting through the provider would never let me get more than 350mbps download and 55 upload and that's on a good day, when im paying for 1GB service.   I live in a town that is fairly small and almost an hour from any bigger cities. When I started my plan through them they put new cable all the way out to the power line. So I know there's no problems with the line at least that has been found.     I am also renting EERO devices for an additional 16$ a month just so i can manage who is on my network and set time limits for the kiddos otherwise I would not be able to receive/modify any of my network settings right?. I feel as if my provider is lying to me that 1GB service is supported in my area.   Every tech that has came out makes up a new excuse each time and they always say that the speed looks good on there end but it could be my devices or some other excuse. The only reason that I'm renting the Eero devices is bec

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Wi-Fi Warriors
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The Many
plantdaddyThe Many
asked in SB8200
SB8200 connection is dropping

Hello, my SB8200 is dropping intermittently for about a few minutes and then reconnects. I had this same issue last year where I had to get a replacement SB8200. Here is my event log and upstream/downstream. Any ideas about what could be causing the issue? I have sent a ticket to my ISP, but wondering if this is a reoccurring Arris issue? Downstream Bonded Channels Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables 17 Locked QAM256 663000000 Hz 2.7 dBmV 41.7 dB 2 0 1 Locked QAM256 567000000 Hz 3.0 dBmV 41.0 dB 0 0 2 Locked QAM256 573000000 Hz 2.6 dBmV 41.5 dB 0 0 3 Locked QAM256 579000000 Hz 2.4 dBmV 42.0 dB 0 0 4 Locked QAM256 585000000 Hz 2.6 dBmV 35.2 dB 0 0 5 Locked QAM256 591000000 Hz 2.6 dBmV 36.5 dB 0 0 6 Locked QAM256 597000000 Hz 2.4 dBmV 40.9 dB 0 0 7 Locked QAM256 603000000 Hz 2.4 dBmV 41.1 dB 0 0 8 Locked

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Wi-Fi Warriors
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The Many
waynegs88The Many
asked in SB8200
My new SB8200, but software says SB6183 DOCSIS 3.0

My new SB8200, but its software/firmware says it is a SB6183 DOCSIS 3.0.  What is going on!  Would I replace it?

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The Many
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mbbelzThe Many
asked in SB8200
Pentair wireless link is being blocked by modem - SB8200

URL is being blocked

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plemans
Juggernaut
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The Many
MrVXTThe Many
asked in SB8200
Who do you believe (Typical xFinity song and dance)

Some minimal background for context, I work 3rd shift weekend providing customer support for an operating system vendor.  This means that I get to (try to) live through any ISP changes that xFinity/Comcast throws on their victims.  About a month ago some change was made and my SB8200 that had been working fine (with a functioning DOCSIS 3.1 indication), so to speak.  Performance went to heck and none of the troubleshooting suggestions helped (rebooted several times, factory reset, etc).  At the time the modem log had an entry about a failed firmware download and most of the channels had logged both correctable and non-correctable errors.  It should have been a hint that the normal address for the SB8200 config pages didn’t respond but 192.168.0.1 connected.Enter Comcast…  After the usual foolishness the agent finally tried to ‘look at’ the modem using their tools and that was a total failure.  From my view the modem was working but, honestly, wasn’t performing as well as internet over

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Wi-Fi Warriors
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The Many
Surfboard RonnieThe Many
asked in SB8200
Unable to setup the SBC app on computer - SB8200

I am trying to set up the modem app for my new modem on my computer.  Have it on mobile, but as I am slowly loosing my vision and it’s hard to see most apps on those small screens.  Why can’t I find an install for the computer?  Am I just not seeing it (no pun intended).  Are you able to help with this request?

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Wi-Fi Warriors
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The Many
BernupThe Many
asked in SB8200
Intermittent internet connection on SB8200

So I was using my internet as normal when I all of a sudden lose connection, look over at my modem and it is power cycling, first power lights comes on, all lights under light up and then they all turn off and it repeats. I don’t have any extra power cables for this so I tried the one from my Phillips hue bridge and same thing. I’ve tried to unplug the modem from the wall, tried a new outlet, kept it unplugged for some time and replugged back in, I’ve also tried the reset button on the back which is when the original power cable stopped working completely. Is this just an issue where I need a new power source or is this thing messed up? I work overnight and need to be on ASAP but can’t figure it out. 

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Wi-Fi Warriors
O
The Many
OlbyThe Many
asked in SB8200
SB8200 Xfinity upload speed not more than 20mbps on 100mbps plan

I have Xfinity 1000 down/100 up plan for over 3 months. I am connecting PC direct to SB8200 for testing and I only get a max of 24mbps upload. Only 1 (new) splitter and no other breaks in the line to the outside box, which has a new cable to the pole. Download is to spec and fine with no errors.Online Xfinity has reprovisioned the SB8200 at least 20 times and rebooted it at least 30 times over the last 3 months and I’ve logged around 22 hours on the phone with them.An Xfinity tech came to my house and tested everything and said it was all 100% and the reason I wasn’t getting 100mbps upload was likely to be Xfinity not provisioning it right.He verified upload 4 bonded channels at 45 dBmV within spec.To rule out the SB8200 I bought an S33 and had exactly the same result so I returned it.When I call them Xfinity is now telling me that the problem is the manufacturer needs to update the modem and they can do no more troubleshooting until that is done. I don’t know if that’s true, or a cop

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The Many
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tampadavidThe Many
asked in SB8200
Is Amazon an authorized seller?

Bought the SB8200 on Amazon in February and it said two year warranty. Arris website says it has to be from Arris.com or authorized seller to be valid. So, is Amazon authorized? It’s starting to lose connection after working fine for 7 months. I see others having the same issue, must be built it obsolescence or lack of quality.

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CBLThe Many
asked in SB8200
Warranty replacement for SB8200

Modem purchased May 17, 2022.  Worked until recently when internet connection would drop several times a day.  Resetting modem several times would restore connection.  ISP checked their equipment and replaced incoming cable because speed was a little slow.  This did not solve problem.  Due to visitors arriving in a few days I purchased a new SB8200 and this resolved problem.  Original modem was purchased at Walmart for $169.00 but they were out of stock when the unit began to fail and replacement was purchased at Best Buy for $138.99.  Both retailers told me to contact the manufacturer to recover the replacement purchase cost.  How do I proceed with this warranty claim?

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Wi-Fi Warriors
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The Many
SayexThe Many
asked in SB8200
SB8200 upload speed capacity

I have been talking to my ISP trying to figure my upload speed issue.  I am on the 1000mbps down and 100mbps up plan. However my upload is stalling at 20 mbps.  I am trying to find out what the upload speed capacity of this modem is. My ISP is xfinity. The lights for down is blue (docsis 3.1) my up is green (docsis 3.0) all other lights are solid green and the modem works great other than my upload speed.  can you tell me if this modem is capable for the 100 mbps upload? Is it because they have not activated 3.1 on the upload channel?

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The Many
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The Many
JimbekaThe Many
asked in SB8200
Web manager SB8200

When I typed in the web address for the web manager, it went straight to it.  It did not require a login and there is not a tab to change the password.  Is this typical?

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Wi-Fi Warriors
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The Certified
wilpr74The Certified
asked in SB8200
New Modem/Router Slow WiFi

I recently returned my xfinity modem/router and purchased a new one.  My IT Guy at work suggested the upgrade to speed up my service.I have the SB8200 modem and TP-Link - AX1800 WiFi 6 Router.I hooked everything up, but the wifi seems to be slower than before.  I don’t know if something isn’t configured correctly? I’m no expert at all so any help would be appreciated.  Here are the screenshots I thought might help.  [edit: removed image with personal information]

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Wi-Fi Warriors
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The Many
bpriscilar93The Many
asked in SB8200
Password for SB8200

I just bought this refurbished modem and was not provided the password. There is no password information on the bottom, which is super annoying. I just tried to factory reset and it still didn’t work. I am beyond frustrated and angry that I cannot find a phone number to contact Arris for help after Xfinity couldn’t help anymore. How do I get this damn thing to work?! Please help!!!

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plemans
Juggernaut
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The Many
MegawattThe Many
asked in SB8200
Cant reach 192.168.100.1 even with direct connect and reboot - SB8200

Hi,  I just upgraded from an SB6120 to the SB8200. All seems well, except I cannot reach the configuration/status page at 192.168.100.1 (It returns “This site can’t be reached” after a timeout) . I can reach my router at 192.168.1.1 in the new configuration (modems swapped),  and access to 192.168.100.1 worked fine before to the older SB6120 when connecting through my router. But the SB8200 refuses to connect, even when I go the extra mile by directly connecting it to my computer and power-cycle the modem. (Which is obviously a terrible workaround, but I tried it)With direct connection from computer to modem, I can use the internet after I reboot the modem, so the computer and modem are talking. But still I cannot reach 192.168.100.1 to look at the Dashboard/etc in the modem :-( Is there anything that my internet provider might have done during setup to lock me out (I didn’t try it before swapping the modem with the IP). Is that possible?  And why did the old SB6120 connect perfectly f

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The Many
G
The Many
GR2The Many
asked in SB8200
SB8200 can I use the arris surboard manager app?

Product description says you can use app. Will the SB8200 work on the arris surfboard manager app?

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plemans
Juggernaut
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