SB8200

ImageImageImageI am trying to connect my modem to my network and facing issues I want you to help troubleshoot for me(it is a arris surfboard model sb2800 docsis 3.1 cable modem. I’ve been waiting thirty minutes and the light has only shown solid blue on the downstream. It needs to show either solid blue or solid green on the connection(very bottom one) to work. Look at the attached screenshots for reference.

I am buying a Used, returned, opened box arris SB8200. wondering if I should concern of possibility that someone might implant a malware in it?  I don’t think I can update firmware myself and am not sure if service provider will update it as it is my own modem.   thanks

I have two ports in back of my SB8200. One goes to the wifi router, working fine. Sometimes I want a “wired” connection. I tried plugging wire into the other port in the back of the cable modem, it lights green, but computer says “no internet”.  I’d prefer to have the wire into the modem (more direct) than a wire into the router.  How to have both ports working with one to a router and other direct to a computer?  Thank you.

I have an SB8200 that will work when directly connected to a computer, but when I connect it to a Linksys wireless router, it won’t connect. I ended up buying a new one, but I would like to understand if anyone else has seen this.

The Ethernet cable in the rear is blinking Amber color

Is 866 757 3598 a scam number or a legit number. If so how do I physically talk to a rep.

Tried different browsers and my event log page is empty.   It formats but has no log whatsoever.   Anyone know why?

Can’t access the Web Manager for SB8200 using the default LAN IP address of 192.168.100.1

Recently purchase SB8200 off of Amazon. Checking hardware version it list Version 1. Am I correct in assuming this has been sitting around for a long while? It appeared to be in original packaging. Should I send it back and reorder in hopes of getting version 7? Send it back and order from Arris with the assumption I’d get the latest version? Not worry about it?

I upgraded my Xfinity plan from 50 Mbps to 300Mbps after purchasing an SB8200 modem.When the modem is connected directly to my computer, I get 300Mbps.When the modem is connected to my router I get the speed of my old Xfinity plan: 50Mbps.I am using two CAT5e cables, each of which, when connected directly from modem to computer get 300 Mbps. I did a hardware reset of my router with no change.My router: TP-link AC2300 Any ideas what might be going on? 

I was using a 6141 but T4 timeouts kept it rebooting.   Went to the 8200 because I wasn’t getting any help with the T3/T4 problems.  So, I think your just fine as long as your local Optimum network is good.   I couldn’t live with the T4 timeouts and reboots.   Oh … my provider is Optimum too.   Not saying my 8200 is doing much better.   No event log,  it staggers at times,  claims it is up when our connected devices say otherwise.   But yeah, calling your provider for a list of supported modems is the answer.

My SB8200 reboots every day.   History of T4 timeouts.   However, my modem never resets the uptime to 0 days.   Makes no sense.   My older 6141 would reset this metric to 0 days after a reboot.  Thanks in advance!

Lights on the back  Ethernet ports are both flashing green. Is this ok?

I just bought a SB8200 to replace an older arris modem, and while my wifi is working, nothing on my hardwired network is connecting.  I have the modem connected to an 8 port switch, and then router is connected through the switch, as well as my Apple TVs and Hue bridge. The router is getting signal and the wifi works fine but the other devices can’t connect. 

Connection Diagramcox <------> modem <------> router <----→ CPU                   SB8200         Netgear            Win7                                    Nighthawk-R7000 The modem/router/cpu seems to work. I checked it by logging onto 192.198.100.1.The cox/modem connection does not seem to work. I can’t communicate to the WWW.The modem was purchased and delivered on 8 Mar. This is my first attempt to use it. Any idea what I need to look at or do to fix the issue? Another thing. I looked at the log file after I logged into the modem. The log file has about 74 entries, starting in 3/2023. Is this a new modem?

We installed Xfinity 1000/40 residential service in, I think, 2017, and installed the SB8200 as the modem. It’s been working. (BIG thumbs up! I cannot complain about several years of flawless service.) When Xfinity bumped service to 1200 a couple years after that, we saw no immediate reason to change modem hardware. Just last week, tho, I discovered that they didn’t just bump it to 1200 down, they also bumped it to 200 up. Nobody talks about the uplink rate. I’ve only been seeing 40 up the whole time since. Well then! I would really like to bump up that uplink rate!I called an Xfinity tech in, who tested the coax up to 2000/450, and what we’re paying for (1200/200), and then speed tested through the modem: the up link rate was 40 Mbps through the SB8200.Is there something I can do to the SB8200 that’ll get me to the promised land (200 Mbps up)? If not, is there another Arris modem that fully supports Xfinity Docsis 3.1 1200/200 coax service?

Just bought yesterday typing to get going this morning need help something isn't right

I recently purchased a refurbished modem and it didn’t come with a WiFi username and password 

Hi All:  I recently set up an SB8200 to take advantage of faster speeds offered by WOW.  My previous modem SBG6580 was working fine.  A serious casualty to the upgrade was my pair of Apple Airport Extreme drives.  I use them for wireless service to my home and as a streaming drive for music to my iPad.  I could not get the drives to set up properly with the new SB8200 modem installed.  My situation was that I could have wired internet service to my Mac desktop.  OR I could have connectivity wired between the Apple drives and the mac with wireless functionality indicated on wireless devices - but NO INTERNET.  I couldn’t have it all.  It was all working together before the upgrade.  After hours of playing with settings on the Apple drives in the AirPort Utility, I reinstalled the old SBG6580 and had WOW turn it back on.  Everything effortlessly re-acquainted and it is all working fine again.  I really would like to get the SB8200 working correctly with the Apple drives but don

Bought the SB8200 about a month ago, it is V3. Direct connect the modem to desktop, got into a strange page per shown. ISP is Spectrum. Research online, I used the last 8 digits of S/N, and admin, get nothing to next page. My goal is modem password change. Thank you.  

I need the password for the SB8200 modem to get internet on my Apple I-Phone 13 PRO

There is no security code, I also need help setting this up. Any help?

Need to reset password so I can get Internet

New modem and router. Modem upstream is blue. Modem downstream not lit up. Internet is kind of slow, pixelated/buffering at times and will kick me off of some apps. What do I need to do?

How to access SB8200 Web portal? I have an ARRIS username and PW and it doesn’t work. I also get a warning that 192.168.100.1 is insecure.