SB8200

Using 192.168.100.1 login is rejected.  Reset the modem with a paper clip and tried “admin” and “password” but they’re repeatedly rejected as invalid username or password.   Any idea how to access modem settings?   Thanks.

According to Cox Internet, I need to “enable” IPv6 on my modem using the Admin console.Unfortunately, the “official” documentation they sent me (https://routerexperts.net/arris-router-enable-ipv6/) seems non-applicable to the situation.The online /phone /chat support drones can’t seem to understand how to even spell IPv6, they just keep saying that _I_ have to configure it on my end.Can anyone help with documentation links or other tips /tricks for figuring out what range and prefix is being advertised to my modem?

I have a new modem on Optimum 400mb service.  My older modem registered fine but the new 8200 is not picking up DOCSIS 3.1 even though the provider says it is being used.  How do you resolve this.  Support telephone number is useless! 

Wi-Fi is not showing after activation 

I have xfinity and using a SB8200 and a TP-Link AX3000 besides for Wi-FI I also have the 2 laptops and an TV connected to the AX3000 My Wi-Fi is going from 800Mbps to ZERO randomly and frequently , even after I run reboots on both the SB8200 and the AX3000. all firware is up to date. Please note that the devices connected to the AX3000 continue to run strong even when there’s no Wi-Fi this is the 3rd router I’ve had this happen to in the past 2 years so i’m thinking it’s not the router any longer. Has anyone had this experience  with an SB?

I’m using Spectrum as my ISP.  I use a SB8200 modem.  As of this morning, internet through my wifi stopped working.  When I run directly from the modem to my laptop via ethernet, I’m able to get internet without a problem.  I did all the routine steps to cycle both modem and router, including factory restoring both.  And I tried 3 different cables between the modem and router.  I figured the router (Linksys EA8300) must be the problem, so I went out and bought a new router (Netgear Nighthawk RAXE300).  Same problem.  WiFi works fine, but no internet.The router shows a solid red internet light, indicating it’s detected the connection but isn’t receiving internet connection.  I’m struggling to understand how going to my pc through the same LAN port, I get internet.  Connecting to the router it does not recognize the internet connection.  What am I missing? My family is losing their collective minds.  Any ideas? 

I understand it’s possible to find browser history on my router.  Can someone tell me where I could find this on my Arris router?  I’ve clicked through every where I know to look but can’t find it.  It says I have a DG 3450A? Thanks!

I am trying to set up SB8200 and I can’t access 192.168.100.1 because of the following error:Warning: Potential Security Risk AheadFirefox detected a potential security threat and did not continue to 192.168.100.1. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details. What should I do?

So i have a issue. Im on 3.1 dosis mode with my provider and they keep telling me to update my modem which is the sb8200. Or contact the company about it which is why im here. I get 1 blue light when is the downstream. And the upstream is green which makes no sense . I pay for a gig down and 105 up. Im only getting 60 upload. I could buy another one to see what happens its been a few year but yea

My SB8200 is connecting to my new router, but is not giving it a new IP address.  How do I activate the external router provision on the modem?

I was on wih Xfinity tech support today because for quite a while I am not getting anywhere near my availble speed which should be around 1 GB. I get anywhere from 300-600 Mbs.  They are telling me i need to update the firmware on my modem. Its not even 2 ½ years old and I bought this model specificially to meet my needs for gigibit speeds. Additiaonlly there doesnt seem to be an available firmware update. So my questions are;1. should I need to update firmware for a device that should already have gig speed?2. Is xfinity blowing smoke?3. Is there firware available that I am not seeing?Thanks 

My ISP claims that its service disruption is limited to a couple of events between December, 2022 and January, 2023.  My experience of problems with internet connections is far more frequent than that.The event log available on the modem’s web page is overwriting more recent events, but there is a persistent error that repeats, in conjunction with other error(4) messages:"SW upgrade Failed after download - Incompatible SW file"  When this happens, my internet connection is lost, and often my Arris Mesh network becomes unavailable as well.  I’ve talked to my ISP technical representatives about this.  They have no interest at all in helping figure what might be going on between the modem and the local whole house wifi.  So much for the event log being important to the ISP.  That might be true if the ISP is supporting this model of modem and renting it out.Question 1:  If I interpret this event as one where Ar

I Installed a new SB8200 on my network today.  Everything is fine with the internet.  It’s nice and fast.  However, I have 3 cable boxes.  We’re not talking smart TVs.  It’s cable boxes connected with coax.  The picture on all 3 is super choppy and pixelated ever since installing the cable modem. Seems like there should be no connection, since the TVs are not reliant on the internet for their programming.  However, I did some testing.  The second I turn off the SB8200, the cable picture clears up.  As soon as I plug the modem back in, the picture on all 3 pixelates again.  There is no question that the cable modem is causing interference on my cable TV picture.is there any way to fix this?  Other than returning my new modem and putting my old modem back in play? 

Should the RECEIVE led light ideally always be blue or is it normal to sometimes be green? Sometimes it changes to green meaning it’s in DOCSIS 3.0, and stays there until i power cycle the modem. Is this less than ideal? Does this indicate a problem with the coaxial line

Why can't I access sb8200 web management using wifi. Is it because my wifi network is 192.168. 0.n and the modem address is 192.168. 100.1?If so, anyway to assign the modem an address in my wifi subnet? 

I activated my Arris SB8200 on Xfinity yesterday. It's not updating the firmware. I've restarted the modem at least 6 times. My Software Version is      D31CM-PEREGRINE-1.1.1.0-GA-11-NOSH. The current version seems to be AB01.02.053.05_051921_193.0A.NSH. Why isn't it updating? I also noticed there’s no Advanced tab in the menu bar.   

I have been trying, unsuccessfully, to get to the admin page. I did a factory reset, and the instructions say to enter the last 8 digits of the serial number as the password, however, the first two of the eight are letters and not digits. Does this mean I’m not allowed to access the admin page? 

Where is the sb8200 manual? 

I Purchased an SB8200. So like any modem I connect the  coaxial cable and power it up. The modem starts to load and  all lights go on.  Then shutsdown and starts the process over again. Disconnect the coaxial and all the lights stay green and steady. Any idea what going on? My ISP is spectrum. I have not contacted them since i cannot get it started up. 

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

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.