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SBG8300

DOCSIS® 3.1 Cable Modem & Wi-Fi® 5 AC2350 Router

  • 392 Topics
  • 1,012 Replies
392 Topics
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The Many
hifidelnorteThe Many
asked in SBG8300
2.4ghz wifi appears briefly after rebooting but then disappears on SBG8300

I have followed all the instructions I can find on these boards and I contacted my ISP and they support the SBG 8300 and firmware is updated. I’m still having trouble getting wifi at 2.4Ghz. Nothing is connected, so there is no congestion. I’ve endabled/disabled and restarted mutliple times. I did a reset of the entire wifi on the modem.  All without any luck. The 2.4ghz will appear briefly and then after a couple of seconds disappear. 

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The Many
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The Many
jetpack1The Many
asked in SBG8300
SBG8300 main WiFi won’t connect but guest WiFi will

I have a surfboard 8300. My main 2.4 ghz WiFi is not working but the guest one is. However only certain things will connect to the guest WiFi and some things won’t. When I try to log onto the web manager on 192.168.0.1 it says the server can’t be found. What setting got changed or corrupted?

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Wi-Fi Warriors
S
The Many
Samcgin75The Many
asked in SBG8300
name and password change on SBG8300

I'm getting an error entering in the IP address using chrome.  Says my credentials are wrong and I'm using the wrong web browser.  

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Wi-Fi Warriors
J
The Many
Johnsjl1The Many
asked in SBG8300
sbg8300 - change Wi-Fi name/password

Just installed. How to change name and password to match my existing network which all of my devices connect to.  When I connect to my previous network, no internet

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plemans
Juggernaut
A
The Many
AlexPad867The Many
asked in SBG8300
Arris SBG8300 - Unable to login the GUI web portal

I’m trying to change my nat type using the ip from my router but cannot log in. I've tried the wifi password, "password" and the password on the actual router but nothing works on the admin login page

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plemans
Juggernaut
B
The Many
BONDAM88The Many
asked in SBG8300
SBG8300 - Power off when wifi & ethernet being used

This is a new issue within the last few days, and was not an issue a week ago when using the router for the first time.When PC is connected to (and using) ethernet, and either the 2.4g or 5g Wifi channels are active, the modem eventually (within minutes) shuts off completely, forcing me to disconnect power and reconnect to reboot. When a device or multiple devices are using the Wifi channels, and no PC is using ethernet, things seemingly work fine.When PC is connected to (and using) ethernet while Wifi channels are disabled, things seemingly work fine.Repeated critical logs include: 72001011-DHCPv6 - Missing Required Option 2472001011-DHCPv6 - Missing Required Option 8272001004-DHCPv6 Provision - 0 Retries Attempted with Last attempt at Wed Nov 13 20:16:27 202472001015-DHCPv6 Failed - No Prefix Available72001014-DHCPv6 Failed - No Address AvailableAll Down/Upstream QAM Power levels and SNR readings look within normal ranges.There is one channel with 117 correctable codewords and 2132 u

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plemans
Juggernaut
O
The Many
Oldguy65The Many
asked in SBG8300
SBG8300 can't find DNS after power outage

After a brief power outage i have no internet. Both lights are green. I have reset the modem and confirmed with Xfinity it's activated and they can see it.

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Wi-Fi Warriors
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The Many
JJenghisThe Many
asked in SBG8300
SBG8300 slow speed

I upgraded my Comcast / Xfinity speed to 1000 GBPS but my speed test only shows up to 313MBPS. I tried and got the same result when tethered on WAN and on WIFI  I’ve tried restarting the modem and router both from Xfinity’s app and power cycling the modem / router. Still no change. I called Comcast/Xfinity and they said I need to lease their latest router / modem for $15/month. Is there no other way to get close to the 1 GBPS speed that I paid for?

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Rockstar!
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The Many
CyneithaThe Many
asked in SBG8300
Intermittent Connectivity surfboard sbg8300

Hi,I have sbg8300 modem.  It suddenly drops connection intermittently.  Internet provider tech said signal is strong.  Is there anything I can do to troubleshoot?  Internet provider is Starlight.   

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Wi-Fi Warriors
C
The Many
cguanesThe Many
asked in SBG8300
XFINITY blame my modem to the slow speed on SBG8300

I have a SBG8300-9D65 and I have agreement with Xfinity for 1Gbps, so I should expect at least 800Mbps but I’m getting less than 100Mbps.This used to work well always over 650Mbps… suddenly I’m having this slow speed.Xfinity tech came to my home and tested the cable from the outside connection box to the connector inside my home, he said it is good, up to 1.4Gbps…My modem is on warranty until March 2025.Should I request a RMA? or there is a tech support for troubleshooting?Any firmware update that I could apply? and how?   

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plemans
Juggernaut
D
The Many
DesertHazeThe Many
asked in SBG8300
Intermittent internet connection issue SBG8300

My modem goes on & off, doesn't work consistently and been a pain dealing with Cox. Now I have a Cox unit testing it and it's certainly my Arris surfboard that's the problem. I just got it last year certainly must not be faulty. Help!

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Wi-Fi Warriors
B
The Many
BCH1959The Many
asked in SBG8300
Connected devices not listed on SBC app - SBG8300

Only one of 20+ devices show online on the app

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Wi-Fi Warriors
B
The Many
BaroqueThe Many
asked in SBG8300
Range Extender compatible with SBG8300 and G54

Does Arris offer a range extender compatible with the SBG 8300 or G54 modem-routers?

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plemans
Juggernaut
O
The Certified
oSam9The Certified
asked in SBG8300
SBG8300 Randomly Rebooting

For the last couple months (roughly 6 or so) my (refurbished) SBG8300 has been randomly rebooting. Sometimes it’s 2pm, sometimes it’s 10pm, on any given day. It’ll  stay up for maybe 4-6 days and then all of the sudden reboot. I can confirm this is what’s happening because the uptime timer restarts. My internet will drop and then my router will have the solid blue light on the internet icon. The reboot takes 5-10 minutes to complete and then it’s back on like nothing ever happened. The device is already connected to a UPS and no other devices connected to it have ever had any power issues. My ISP is Xfinity (unfortunately no other options) and they’ve confirmed everything looks good on their end. We’ve done the whole song and dance of rebooting the signals and my router multiple times but it doesn’t change anything.I’ve been having this issue with this router for at least the last 6 months and have just been dealing with it since I’m no longer under warranty and unwilling to pay tech s

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Wi-Fi Warriors
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The Many
LanceThe Many
asked in SBG8300
SBG3800 Web Manager and Surfboard App not showing all connections

I recently installed an SBG3800.  The Surfboard Web Manager only shows 9 connected devices; the Surfboard Central iOS app shows 0 connections.  I can see all 12 connections on the Fing app.  I have tried restarting the modem. Hardware Revision: 6Software Image Name:AR01.02.078.04_092820_711.NCS.10Firmware Version:01.02.078.04.NCSRDK-B-LLC:rdkb-20171127SDK:7.1Wi-Fi Driver:4.7.23.30.4.0

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Wi-Fi Warriors
M
The Many
MvheartThe Many
asked in SBG8300
5G not working on Surfboard sbg8300

I was having connection issues on my Arris SBG8300 using 5G. I enabled band steering, and now the 5G channel doesn't even show up as an option. 

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plemans
Juggernaut
S
The Many
shef777The Many
asked in SBG8300
Port Forwarding on SBG8300

No Port Forwarding 

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Wi-Fi Warriors
R
The Many
Richard JettThe Many
asked in SBG8300
Slow speed internet connection on Arris SBG8300

Xfinity just  sent me an email stating that my Arris SBG8300 modem will not deliver 1.2 Gbps which is the speed provided by their network. My speed check comes to 868.5 Mbps and I am CAt6 hard wired to the modem approximatly 20 feet away.Can anyone on  this form collaborate this info? And if so, does Arris have any suggestions to remedy this problem? Software upgrade?

701
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Rockstar!
N
The Many
nasario castanonThe Many
asked in SBG8300
cant access admin portal on SBG8300

i cant access the admin login. i used the default login after i reset the router and still cant get in. it does say im using an unsupported version of chrome but mine in is updated and because of that the browser is unsecure. I've tried adjusting every security setting and even downloading an older version of chrome but nothing has worked. i could use some help if anyone has any ideas

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Wi-Fi Warriors
T
The Many
tacotacotacoThe Many
asked in SBG8300
SBG8300 network goes down when laptop connects

I bought an SBG8300 gateway a couple months ago, replacing an Xfinity rented gateway. Since then, I’ve had an issue where connecting my laptop to the wifi will cause the network to crash within about 30 seconds, sometimes faster. I have one desktop PC connected via ethernet, my phone is sometimes but not always connected and does not cause the crash, and there is a wifi printer which seems to have connection problems in general (I believe it may crash the network too, but it is hard to tell, since it disconnects at random - I believe this is an issue with the printer). My network is 400 mbps with Xfinity, and I had no issues while using their (rental) gateway. The laptop, a Samsung Galaxy Book 4 Edge which came out very recently and is new, will cause this crash consistently. After a few minutes, the network will be back up, and from there it will usually crash at least one more time, but not always. Depending on the day, the network will either crash repeatedly, or will start working

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Wi-Fi Warriors
R
The Many
Raytone1The Many
asked in SBG8300
Slow Wireless vs wired speed with SBG8300

I have a 800 mbps service from xfinity. I get roughly 500 mbps wired and less that 100 mbps wireless.  I’m sitting 5 feet from the router unobstructed.  Doesn’t matter if it’s on the 2.4 or 5 channels. what are your thoughts? Thanks! 

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Wi-Fi Warriors
B
The Many
Brians34The Many
asked in SBG8300
Unknown device how do i block it on SBG8300

I have an unknown device showing on my surfboard app.   I've been throughout my home and can't find any other devices I haven't named in my surfboard.  I want to remove or block access to this device but I don't know how to do either of those things on my android phone app.  Can you please tell me how I'd go about blocking or deleting this device from my system? I have my 2 printersMy NEST  ThermostatSon's Play StationFirestickVIZIO TV and all other things that were connected to network on itROKU TV3 EVO FORCE1 boxes for televisionsMy phoneSon's phoneSon's laptopMy laptop Been through the house, no idea what this last thing could be.   Unplugged Alexa,  but apparently that is Bluetooth.  

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Rockstar!
M
The Many
MontybarThe Many
asked in SBG8300
No internet and needs firmware updated on SBG8300

I own my sbg8300 modem-router and use Mediacom. Recently it stopped working and I couldn't connect to the admin page, so I hardcoded my computer IP settings, connected to the router, and found that the ipv4 settings were all wrong. I reset them and the router worked for two weeks. Today they are messed up again and it won't save my changes. Right now the gateway is set to 120.74.103.183 and the subnet is 0.208.94.67. These are wrong, right? Is my firmware corrupted? How do I fix it?

1994
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Wi-Fi Warriors
J
The Many
jdiliddoThe Many
asked in SBG8300
The 2.4GHz network password is no longer working

I have an Arris Surfboard SBG8300 where the password for the 2.4GHz network isn’t working with new devices. I can connect to the modem/router and the password for the 2.4GHz network is correct in the Admin portal. Devices that have been connected to this network are working fine, but when I try to connect a new device (Echo Dot) to the network, I get an invalid password error. I’ve verified the password in the admin panel is correct and I’ve entered the password several times into the Alexa app that connects the Echo Dot, but I still get the password error. I have many devices using the 2.4GHz network, and they are all working fine. The error only happens when I try connecting new devices.This doesn’t happen only on Amazon products. I only have this error on new devices that are limited to a 2.4GHz network. My only workaround is to use the 5GHz network. It’s using the same password as the 2.4GHz network, and I am 100% certain that I am entering the password correctly.I don’t want to re

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J
The Many
Y
The Many
YarleThe Many
asked in SBG8300
SBG8300 shows only solid blue light and no internet

My sbg8300 shows only blue light and lights do not change. I cannot connect to modem using Ethernet. I tried resetting the router but nothing happens. 

701
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Wi-Fi Warriors
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