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SB8200

DOCSIS® 3.1 Cable Modem

  • 491 Topics
  • 1,264 Replies
491 Topics
hightide
The Many
hightideThe Many
asked in SB8200
Recommendations for a switch for SB8200

I have Cox for Internet. Cox support told me to use a switch (not a router) to connect two computers to the modem. It seems like a simple thing to do, and I want to be sure to get a compatible switch. Any recommendations for a switch?I'm also considering having a Cox technician come to my house to do the setup in case there are things I don't know that need to be done -- currently have their Panoramic modem/router. Is that a good idea?

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hightide
The Many
12 hours ago
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The Many
sae2804The Many
asked in SB8200
SB8200 configuration on slow speed

I’ve been using an SB8200 for several years. I seem to recall a setting specifying the expected speed from the ISP. Comcast recently increased their speed but it seems I’m locked to the previous value (using Speedtest). How do I reset that setting (or am I remembering incorrectly)?

171
plemans
Legends
1 day ago
H
The Many
Hendro07The Many
posted in SB8200
Connectivity with Astound and trying to setup the SBC app

Im In surfboard app.  I called my provider and they registered my product.  The app is now saying please enable WiFi settings and ensure that you are connected to your home network wifi with network connectivity.  I believe I should be. 

131
plemans
Legends
1 day ago
M
The Many
Mlindsey1981The Many
asked in SB8200
Arris surfboard SB8200 warranty - experiencing intermittent internet connection

Bought Arris Surfboard cable modem SB8200 from Amazon February of 2024. Needed a higher end modem to support the speed and devices we currently run. After installation just recently December 2024, we experienced extreme lagging in our web browsing and gaming. Also, the app to Install is out of date. Only older versions of Android can install it. We hooked up our previous netgear modem again, since it wasn't giving us as much issue as this newer Arris cable modem. I would like to know what the warranty will cover since it is practically never been used and we are not satisfied with the product?

241
plemans
Legends
1 day ago
C
The Many
cmilam47The Many
asked in SB8200
SB8200 - Docsis 3.0 to Docsis 3.1

My SB8200 will not connect to docsis 3.1. I have a spectrum gig plan. Spectrum tells me my plan is docsis 3.1but my modem is stuck in docsis 3.0. I don’t see an option how to change the setting in the management page. spectrum is no help and tells me to contact the manufacturer. Any help would be greatly appreciated Also I cannot access the management page while the modem is connected to the net. I can disconnect from the net and access the page. 

241
plemans
Legends
1 day ago
K
The Many
kbirkenThe Many
asked in SB8200
SB8200 faults out once or twice a year and can't access internet while connecting router

I have a SB8200 modem and for no reason at all it drops our internet connection and I have to call for a paid service to walk me through the issue to correct it.  Have my computer connected to the modem and it says everything is working fine but the indicator lights are: power - solid green, Receive - solid blue, Send - solid green and online solid green.  I can access the internet when connected to the modem but my nighthawk router will not connect.  I have logged into the modem manager but don’t see anything out of line there either.  Any ideas on why I need to call for assistance one or twice a year to adjust my settings to allow it to work again? Wifi - Netgear Nighthawk X6S, AC4000 Tri-band, model - R8000P

214
plemans
Legends
4 days ago
W
The Many
westwayThe Many
asked in SB8200
New SB8200 all green lights

So, yesterday I purchased a new SB8200 and had Cox activate it. However, while it works all the lights are Green, shouldn’t two of them in the middle be Blue? I’m 80 and not that tech savvy.

904
P
The Many
8 days ago
K
The Many
KMWNAZThe Many
asked in SB8200
Cannot connect to SB8200 Router has IP address

I have an Airport Extreme which evidently automatically takes the 192.168.100.1 IP address so I am unable to connect to my SB8200.  Any suggestions? 

686
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Wi-Fi Warriors
10 days ago
M
The Many
mikeycurtThe Many
asked in SB8200
DHCP private address on SB8200

Doesn’t DHCP a private address.

264
plemans
Legends
11 days ago
R
The Many
RobinKnudsonThe Many
asked in SB8200
SB8200 addressable from Xfinity, but "No Internet" from home, need warranty process

SB8200 was in service since August 2024 and under warranty.In December 2024, “No Internet” status from all home computers.All status lights (Power, Receive, Send, Internet) solid green, none flashingComputer directly connected to the modem also reports “No Internet”.Xfinity reports modem is fully addressable from their end (but lights never flash)Approximately 3 hours Xfinity phone support and over a dozen modem/router reboots performedIPCONFIG /RELEASE, IPCONFIG /RENEW performed, PING local network addresses successful, PING internet unsuccessfulNeed process to return modem under warranty

503
plemans
Legends
15 days ago
C
The Many
Cross BilliardThe Many
asked in SB8200
SB8200 Not Allowing me to connect multiple items via ethernet

Hello, I have a small mesh wifi network comprised of two W12’s (one of which is operating as router connected to the SB8200 via ethernet) and the other which acts a node. My GF just recently got a stay at home job which she got a desktop for and it needs to be connected via ethernet.  When I went to connect the ethernet into the other port initially it wouldn't connect to the desktop. So I rebooted the system to which the ethernet worked but the router wouldn't connect. After hours of trouble shooting I found myself here.  Any recommendation as to how I can hard wire a device to my modem while still allowing my wifi to work? 

211
plemans
Legends
18 days ago
S
The Many
sarahjfletcherThe Many
asked in SB8200
Parental Controls on SB8200

Hi, I am trying to set up parental controls. I have a SB8200. I downloaded Surfboard Central, but don’t see the option to create users or set up rules to manage their screen time. Thanks for any help!

141
plemans
Legends
18 days ago
K
The Many
kmzhang16The Many
asked in SB8200
Arris Surfboard SB8200 Making Constant Ringing Sound

My modem won’t stop making a ringing sound when on. This started around a year after first using the modem.

332
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Wi-Fi Warriors
19 days ago
C
The Many
creativmind1977The Many
asked in SB8200
sb8200 second green light just flashes

The first light is solid but the second is just flashing. Did the ethernet to the laptop and still no internet, can't even connect to the modem itself. 

221
plemans
Legends
19 days ago
F
The Many
FrankenWolfThe Many
asked in SB8200
sb8200 - 2nd port is not working

Sb8200 second port not working?

251
plemans
Legends
23 days ago
J
The Many
jscThe Many
asked in SB8200
GUI web portal doesn't work on SB8200

The manual instructs me to open a browser & enter an IP address to log in to change the name / password for the modem.  When I do so, I get an error message saying the site can’t be reached.  I’ve tried on 3 different browsers and I get the same error message.  I have the SB8300.

703
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Wi-Fi Warriors
25 days ago
R
The Many
rmnordlundThe Many
asked in SB8200
SB8200 - how to use the modem with ethernet input from ISP

I have an ethernet cable input from my provider (Reliance Connects). How do I connect it to the SB8200 modem?

212
S
Wi-Fi Warriors
26 days ago
D
The Many
David HanleyThe Many
asked in SB8200
security code Wi-Fi to connect the device

I had to recently do a complete recovery on one of our laptops. I can't find my security code needed to start my wifi. We bought the Arris in June of this year

131
plemans
Legends
26 days ago
J
The Many
jken75The Many
asked in SB8200
sb8200 modem reboots randomly several times a day

I have an sb8200, and it reboots randomly several times a day. The cable company says everything looks good on their side. Is this a sign of a bad modem? I checked all the connections and reset the modem to factory settings,  but even after doing that, it still reboots, kicking us off all our streaming devices.

921
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Wi-Fi Warriors
29 days ago
W
The Many
WVZR-1The Many
asked in SB8200
SB8200 Comcast/Xfinity slow speed internet Issues

**** Excuse the SN8200 in the title *****  Moderator can you fix please? **** I had a T25 VOIP modem but dropped VOIP and the T25 was only functioning at maybe 75% of an advertized connection of 500 generally much less maybe 275 or less. This SB8200 doesn’t seem to perform much better or maybe worse from time to time. These are images from a 3 hour fresh Comcast/Xfinity connection and I have used the ‘reset’ depress on it. Channels 33 and 34 interest me. The channels that aren’t in  the image are similar to what’s in those that can be seen. What about the errors on boot that I see?Channel 33 on a fresh boot was 3.7dBmV  40.5dB 123553490  519The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur.   Time  Priority  Description  11-29-2024, 15:40:38  Critical(3)  Started Unicast Maintenance Ranging - No Response received -

1009
W
The Many
29 days ago
D
The Many
DocRodgThe Many
asked in SB8200
SB8200 - No internet

Arris surfboard sb8200 connected with service provider and double checked - registered modem and still no internet

562
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Wi-Fi Warriors
29 days ago
J
The Many
Jim StanleyThe Many
asked in SB8200
Adding a VPN to Arris SB8200

Is it possible to load my VPN to my Arris Modem and route it through a VPN router to cover all devices in my house? If so, are there instructions somewhere to load the VPN to the modem? Are there any special things I need to do in order for this to work? Let me know. ThanksJim 

381
plemans
Legends
1 month ago
S
The Many
Stasha4eThe Many
asked in SB8200
cant get my Arris SB8200 to stay connected

In the app I get the modem to connect to my internet and then when I try to sign into the app to use it it tells me it lost the connection try again. Many try’s help!

373
plemans
Legends
1 month ago
B
The Many
bizModemThe Many
asked in SB8200
SB8200v3 occasionally crashes - Comcast says that they have no control over firmware

I am aware that there are other firmware related posts but am lost about what to do next.We are Comcast Business internet customers and decided to get our own SB8200v3 modem and WiFi router as the Comcast modem / router combinations didn’t offer the features we needed. The modem however crashes every few weeks, what is a problem when I am not in the office as people struggle to trouble shoot and reboot the modem.I spoke today twice with the Comcast support, both associates claimed that they have no access to my modem, what I however believe is not true.Can somebody direct me to how I can get the firmware checked and updated if possible?I currently have the firmware version ( edited personal information )

856
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Rockstar!
1 month ago
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The Many
Tiny_Tim4The Many
asked in SB8200
How to update the user Name on http://192.168.100.1?

I was able to locate how to update my Password, however I would also like to change the user name to something other than simply “admin”.  Where is there a link to accomplish a user name update?

702
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Rockstar!
1 month ago
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