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S33 | S34

DOCSIS® 3.1 Gigabit Cable Modem

  • 354 Topics
  • 914 Replies
354 Topics
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The Many
DonPThe Many
asked in S33 | S34
New S33v2 Already in use and unable to activate the modem

I bought a new, factory sealed S33v2 but Xfinity (Comcast) was unable to provision it as the MAC address was already in use. How can that be?

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The Many
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bobmaccThe Many
asked in S33 | S34
excessive data usage-S33

Nov 2023 installed ARIS S-33 modem. Data usage went from an average of 350Gb/month to 1323Gb/month for Nov & Dec 2023 and Jan 2024.No changes in data intensive activity, no gamers. Only change is went to Hulu Streaming TV and dropped Xfinity Cable TV.Any ideas why this would happen?

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norsemanThe Many
asked in S33 | S34
S33 Firmware

What version do I have? The info page shows "NA". How do I perform an update? 

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plemans
Juggernaut
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The Many
Jackie113The Many
asked in S33 | S34
S33 Replacement not working - Arris won't refund

So I had a S33 for a few months, then it stopped working. Arris sent a replacement. The new one won’t connect at all. I worked with Xfinity for over an hour trying to get it connected and they told me there was a Docsis error on the modem. So I’m using a rented Xfinity modem now and it works perfectly.I called Arris about just sending theirs back for a refund but I was told that was impossible since it was a replacement. They want to go through troubleshooting before they’ll even offer any recourse.I am done with Arris I think. After going through two bad modems I just want a refund. Will they offer a refund if I go through troubleshooting with them and it still doesn’t work or will they just send an endless stream of replacements until my warranty runs out?

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Wi-Fi Warriors
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The Many
dabeekThe Many
asked in S33 | S34
S 33 won't regrister with Xfinity

Tried to activate an Arris S 33 with Xfinity, Xfinity said that my old 6190 modem is too slow for my internet speed, and I needed to upgrade.  My modem won’t activate, I have tried many times using the app, the light flashes green, and after 11 minutes the app says it couldn’t find the modem.  I hooked up a computer to the modem and on the status page is says security failed, and Docsis network access enabled, Status Denied.  Today, Xfinity came out to check my lines, I had a weak signal, they replaced lines and connectors and when the tech was done, I had a great connection.  He tried many times to activate the modem and couldn’t.  He finally called his tech people.  The tech lady tried to activate the modem on her side and said that it showed active, but wasn’t connected.  She said that she couldn’t see an IP address for this modem, and because of that, couldn’t activate the modem.  She told me to contact Arris and see if anyone has had this problem and how to fix this problem.  This

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The Certified
billin30The Certified
asked in S33 | S34
Arris S33v2 Xfinity Issue and modem rebooting on its own.

I posted on here a while back about my S33v2 randomly rebooting several times a day. I have been chatting with some Xfinity agents on Reddit and they lead me to an interesting discovery. While the S33 is on the list of recommended devices, the S33v2 is merely listed as compatible and not recommended. According to the internet, the v2 was released in mid-2021. Despite a different chipset and firmware, there is little difference between the two. Why has Xfinity not certified the v2 version in the last 2.5 years when it is clearly the newer product and probably the only one you can actually buy for the last 2.5 years?My issue is clearly something to do with this modem as I had been using Xfinity’s XB8-T modem for the last month and had zero issues.Is there anything I can do about this except just keep using the XB8-T and eating the $15 bucks a month?If they havent certified the S33v2 in 2.5 years, is there a decent chance they will ever do it?Thanks

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The Certified
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sjalalThe Many
asked in S33 | S34
Surfboard does not connect early morning on S33

Hi , I just returned my Xfinity Arris modem and got a SurfBoard S33. I have LinkSys mesh routers in both the cases that work OKI have noticed early morning the Wifi connection does not work and Internet starts to works about 5 mins after connecting.  Can you pls suggest an fix for this ? Is there any upgrade that needs to be done as I bought this SurfBoard from Amazon ?? Thanks in advance  

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Wi-Fi Warriors
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KENN8859The Many
asked in S33 | S34
Arris S33 won't connect to Linksys EA8500 router.

I purchased the “Arris Surfboard S33” router today to replace my old Lynksys router.  I have upgraded my internet speed to 1GB.  I got the S33 activated by Xfinity and followed the procedure for registering the product as the instructions listed.  After verifying that the modem was converting the cable signal to an internet signal, I attempted to connect my EA8500 router...1st on the 2.5G port then the 1G port.  In either situation the light on the EA8500 continues to flash and no “new” network is seen.  Any helpful suggestions are appreciated as to how to troubleshoot this problem.  Thank you

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plemans
Juggernaut
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ijs32The Many
asked in S33 | S34
S33: Front Panel LED is solid Amber for 20s and then flashes white (and repeats)

I came home from being out for a couple of days and my Arris S33 modem appeared in an error state. No internet connection on any of my devices. The front LED turns a solid amber for 20 seconds, then flashes white, then turns off for 2 seconds before repeating that cycle. Tried hard resets and checking cables; also tried troubleshooting with Cox, but the modem just remains in whatever state it’s in. Modem is not responding to input from the reset button, either.  I’m not sure what to do as I haven’t seen any posts with a similar issue to this. I received the modem as a hand-me-down and have only had it plugged in for less than a month (and it’s worked fine until now). 

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Wi-Fi Warriors
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The Many
CpudzThe Many
asked in S33 | S34
Slow Wi-Fi internet on Arris s33

First Ethernet cable worked to hardwire a desktop- internet was fast and reliable. Then connected wireless router to second Ethernet port- Wi-Fi internet is now good, but the desktop that was hardwired does not have an internet connection. 

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plemans
Juggernaut
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The Many
HaoruiThe Many
asked in S33 | S34
S33V3 LOW INTERNET SPEED

I recently upgrade my xifnity plan to 2Gig with the Xfi router, it was 1900mbps for downloading and 45mbps for uploading. I replaced the Xfi Gateway with the newest S33V2 surfboard and the speed drops to only 700mbps with direct internet connection and 5mbps for uploading. I have a tech from xfinity do the test, the Xfi Gateway can run full of 2000mbps but the S33V2 cannot. The tech suggested me to contact the Arris customer suport for a solution. He thought there might be a issue with the Arris cable modem since the speed is only 700mbps.Best

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Wi-Fi Warriors
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The Certified
GorelyThe Certified
asked in S33 | S34
S33 intermittent internet connection

I bought my Arris S33 modem July 4 2022 through Amazon for over $300.00less than two years have gone by (07/04/2022 - 01/26/2024) and my warranty with Arris is already expired according to their website. I have been experiencing a lot of problems staying connected to the internet even though I usually get nice speeds when I am connected.  I went to my ISP, Optimum, and the front counter associate checked out my modem and let me know it was causing the intermittent issues due to 4 bad channels out of the 32 channels it has.  He then explained to me that the modem most likely does not have anyway of just turning off the 4 bad channels.  So, my question is can I fix my modem such as turning off the 4 bad channels it has, or can I still return my modem to Arris to have them fix and/or replace it even though it’s no longer under warranty? Thanks for any help in advance.

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The Certified
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The Many
DiyGuyThe Many
asked in S33 | S34
S33 Login to GUI web portal

I cannot log into my S33 for the first time.Using admin for the user name and password for the password.Even tried using the last eight digits of the serial number.Thanks in advance.  

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plemans
Juggernaut
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The Many
Cellular_MatrixThe Many
asked in S33 | S34
Arris S33 Web Manager New Password Length Login Issue

I just purchased this modem yesterday. What is the maximum number of characters when changing the default password for the Arris Web Manager website to something unique? I successfully changed this to a 16 character password (documented in Last Pass) and the website confirmed my new password as having been applied. When I now try to login with my new password, I can only enter the first 15 characters in the field and thus cannot login. What gives? If the 16th character was silently ignored during new password creation, then the first 15 characters should suffice but it’s a no go with just the first 15.

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Wi-Fi Warriors
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The Many
ddwebbThe Many
asked in S33 | S34
SMS via WiFI doesn't work with S33 Modem

I have Xfinity Internet with mobile.S33 Modem with Asus ZenWiFi AX6600 mesh routers (3 ea).I think around the time I installed this setup from the Xfinity modem/router setup, I lost the ability to send and receive text messages with pictures via SMS. Don’t know how to find that ability to correct that.Any suggestions would be appreciated. 

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plemans
Juggernaut
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The Many
Jackie113The Many
asked in S33 | S34
S33 won't connect and makes high pitched whining

Was working for a few weeks, then started to have trouble connecting and makes a high pitch swuealing noise before connecting. Yesterday it took about 30 minutes to connect after power outage. Today we rearranged and unplugged it for a while. Now it wont connect at all. The light is solid amber except every 8 seconds it turns green for one second then back to amber. The whine is constant.

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namrevil71The Many
asked in S33 | S34
Arris S33 periodic slow down to 30mbps on Cox

Hi everyone,I have a brand new Arris S33 on Cox Hampton Roads VA Beyond Fast internet Tier 2g down/100mbps up speed package. It is connected to also a brand new Orbi Mesh RBR60 with one additional satellite. Wan cable between the modem/router is connected to the Arris 2.5gb port of course. My speeds tests average around 2300gbps down and 100up consistently 98% percent of the time and all my devices throughout the house apple TV’s, cams, etc work great no buffering. The coax running to the house( RG-11) by Cox are relatively new from the pedestal to the demark and from there to the modem(New RG 6)and great signal readings have been verified by both senior Cox field techs and their supervisors and maintenance and headend techs have indicated everything looks perfect ayt every connection point(I used to work for Cox in tech support and still have some contacts fortunately in field services:) It is also a straight coax run all the way from the street, no splitters, amps etc as we only have

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PabloThe Many
asked in S33 | S34
No internet on S33

My Arris S33v2 stopped working and has a white light in the front. What does a white light indicate? Seen meaning for other colored lights but not white

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Wi-Fi Warriors
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The Certified
nelsons21The Certified
asked in S33 | S34
Firmware release name/ number for S33

I am looking to find out what the latest release and version is for my S33.   I would like to know if the one I purchased is up to date.   I understand because I own it I cant update it from you nor will my ISP.  And dont tell me they auto update it, because they dont.That isn’t the question.   I  want to know it for my knowledge, and if you wont tell me, why wont you?So, when we think it might be too old we can replace it.

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plemans
Juggernaut
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The Many
charlotte_lynn99The Many
asked in S33 | S34
Warranty S33

Modem not maintaining connection and overheating as well warranty is still in effect.

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Wi-Fi Warriors
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The Many
steven17sThe Many
asked in S33 | S34
S33 Not connecting to the internet with a direct ethernet wired connection

Hello, I have an S33 modem with Spectrum internet. The spectrum tech installed the modem and it has been hooked up to a wireless router and working fine with all wi-fi connections. After the install I connected the modem directly to a network switch and the wireless router still works fine. However I have connected an NVR home security system to the switch that requires direct ethernet and it wont connect. I called the security camera support and they are telling me that the direct line is IPV6 and it needs to be IPV4 to work. I am also experiencing no internet connection my wired Samsung smart tvs. Is there an easy fix?

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WellerslThe Many
asked in S33 | S34
LED stus light.

Years ago, when I set up my S33, I turned the LED off. Now I want it back on. I was mistaken that a hard reset would do that. I'm kind of surprised that it didn't.I downloaded and installed the web manager. No joy there because the app can't find the modem (?!?).So... What's the trick?

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plemans
Juggernaut
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The Many
pcintraThe Many
asked in S33 | S34
Surfboard cable modem S33 D3.1 with low upload speeds-s33

I'm an Xfinity internet customer experiencing an issue with my modem's upload speed. While my download speeds are good (around 450 Mbps), the upload speed is erratic, ranging from 0.1 to 1 Gbps within a short time frame.A technician visited my house and checked the coax connections and modem performance. Although they didn't find any obvious issues, they suspected a possible hardware failure within the modem. They temporarily installed a different cable modem, and the upload speed stabilized significantly.The modem I'm currently using is an Arris model purchased in February 2021. Given the technician's suspicion and the temporary fix, I'm considering replacing the modem. However, I'm unsure if this is a common issue with Arris modems or if 3 years is the typical lifespan for such devices.I'd appreciate any advice on whether to replace the modem and what brand/model to consider. Has anyone else experienced similar upload speed fluctuations with their Arris modem?

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Wi-Fi Warriors
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The Many
jim413The Many
asked in S33 | S34
internet speed plan for S33

Can i use S 33 modem with a 300 mps internet plan now. Possible upgrade to 1 gb plan in future..   

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Wi-Fi Warriors
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The Many
ayoder56The Many
asked in S33 | S34
s33 2.5G Port not working? (Unifi UDMP)

Hello - I recently purchased an S33 and have it configured as follows: Spectrum -- S33 -- SFP+ -- Unifi Dream Machine Pro WAN port The SFP+ is a 1-2.5-5-10G model from Ubiqiti. This configuration works just fine when I plug into the 1G port of the S33.  However, when I plug it into the 2.5G port, I get….nothing...no LEDs light up on the Unifi port at all.  The LEDs on the back of the S22 are solid green and amber.  I have tried multiple cables (currently using 0.5m of class 6E), rebooting both the modem and the router, etc., but nothing seems to work.   One other thing that might be relevant is that when it was originally provisioned it was done on the 1G port.  I called Spectrum, and they said that provisioning one port or the other wasn’t something that they did anyway. So, the question is:  how do I “enable” the 2.5G port? Thanks for your help!!

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plemans
Juggernaut
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