Also getting: SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx;CM-QOS=1.0;CM-VER=3.0; Started Unicast Maintenance Rangin

I response to a picture quality concern with a new X1 DVR box with a hard drive, XfinityDemitrius responded "With the new DVR, you need to be sure you are playing content that is stored locally and not located on the cloud. Video content that is recorded within the Cloud DVR may not look as sharp as

X1 Box is stuck in a Platform Update loop, the update Fails then waiting for SNMP Trigger then restart and just the same for the last 5 hours. I have unplugged the box still the same. I have tech restart my box and the line all is well just the same old loop for the update

Something happened around 1 AM on May 24 (see screenshot). I lost all IPv6. I rebooted all my network equipment and PCs, reset my Netgear CM600 to factory, retightened all connections, no effect. I have included the recent modem logs as well. Is this my problem or yours? Thanks for reading and pleas

I have my own Netgear CM3000 and when it's connected the speed is plenty fast (I have an 800mps plan). However, my internet drops multiple times per day and this has been going on regularly for the past few weeks. We've had service at this address for 12 years (and with this modem for at least a yea

Hello, I've been experiencing intermittent connection issues with my Nighthawk CM1200 modem over the past few weeks. The connection drops randomly, and sometimes it shows the signal is strong but the actual speed is slow. I've noticed the following: I've tried power cycling the modem multiple times,

Hello Xfinity Community, I want to start this post off by saying, I have had stable internet for many months prior to the issue I'm currently facing. The Coax cable comes into my house and routes through a 1 to 2 splitter (A CommScope SV-2G, the xfinity tech installed it during their setup visit a l

Hi all - I have xfinity internet (obviously) with 400mb down. Over the past few months, I've experienced increasingly erratic connectivity, making it almost impossible to play a simple youtube video without it stopping and giving you the old buffering circle every 15-30 seconds. I have an Arris MB86

​​I am experiencing a persistent issue with my internet connection that has been ongoing for several weeks. Despite multiple calls to your customer support team, the problem has yet to be resolved.​​ ​​I was initially advised by one of your technicians to replace my modem, which I did, but unfortuna

the wifi speed has been getting worse. my plan “superfast” 800Mbps was upgraded by Xfinity last spring from 600 Mbps and lately i get barely 100Mbps and even less when one foot away from wifi. i was on a support chat with a tech today. they reset the modem, reinstalled the firmware on my Netgear C70

​​​I have just recently experienced this problem after more than 5 years of service.​​​ ​​​My neighborhood has recently experienced an unexpected outage on 3/8/2023, lasted about 8 hours; since then my network keeps randomly disconnected and I have to remove the cable from the modem, and recycle the

Hi I do have about 2 to 4 short disconnects everyday (as measured by my Firewalla router). They last about 1 minute. Equipment: Modem = NETGEAR Nighthawk CM3000 Router = Firewala Gold SE Below is my Cable Diagnostic file (MAC address redacted). My router first report first "Failed DNS test" and then

For the past couple weeks, I've been seeing intermittent losses in connection for anywhere between a couple seconds and a couple minutes. The frequency seems to vary; it may be fine for a few hours, but other times it drops 3 times within 20 minutes. I haven't had any issues for years before this. I

For some time now I have been getting a very high error rate on one downstream channel on my Arris SB8200 V6. This is accompanied by repeated errors in the error log as shown below. (I have obscured the CM-MAC address). Is this a problem with Comcast equipment, or interference from some local 591 MH

I recently upgraded from a DOCSIS 3.0 to a 3.1 modem - the Arris Surfboard S33. My previous service was rock-solid but now I am experiencing disconnects every ~20 minutes, lasting around 4 seconds each. I'm attaching some logs that might help diagnose my issue based on similar posts I've seen in the

I noticed that my DHCP IP address from Xfinity is now 10.0.0.x, which used to be 172.x.x.x and/or 54.x.x.x. Is this a new range of IPs that Xfinity is adding new, or am I just noticing it now? I work from home and just want to make sure.

Recently, Xfinity performed an upgrade to the infrastructure in my neighborhood which caused an outage of almost 48 hours to TV, Phone and Internet services for my home only. Support says there were no issues in my neighborhood and that it was my equipment only then ran through the standard power-cy

I've been dealing with an issue that I believe is a Comcast signal issue that is causing my modem to lock up. I have a Hitron Code56 which I got on November 25, 2023 to replace an Arris S33 as that doesn't support the faster upload speeds. Since Jan 7, I've had the Coda56 "lock up" where the lights

Please help me! I am caught in an endless loop with Xfinity technical support with no end in sight. For over a month now my cable tv and internet service has been degrading. Initially it was just an occasional short outage and has progressed to the point where several of my favorite cable channels a