Xfinity 1200/200 speed tier showing 1200/64 Bad Gateway?

[spudler_t]

So I have been noticing  my iRacing streams are Dropping Frames (Network) and I am  only set to upload now at 18Mbps (I am paying for 200 Mbps Upload)

Before I have to contact Xfinity Customer Service and play the BS game I want to see if my Idea of what is wrong sounds correct.

I have Hard rebooted the Gateway a few times now and each time I see the list for the Channels upstream  are either completely blank or only have a couple channels shown so I am suspecting the gateway is having some sort of issue.

Dang I did not realize that this started on 8-8-24 according to my results history , prior to that my upload was close to 200Mbps after that it is in the 60's Mbps

I could see that being an issue if I am streaming at 18Mbps as well as having the Sim running and a few other apps.

But just to be sure ill wait  for a reply before I call or go to the xfinity store

[spenceteeth]

Property environment could be a cause. Rural, Suburban, Multi-dwelling areas react differently underload. If a splitter is damaged, hastily connected, or just may need cleaned and reterminated.

 

I am not familiar with iRacing's requirements but I would double check all hardware and settings on your system. Work backwards like water draining back to gateway. A hard bent ethernet cable, animal chew even sunlight can degrade cabling performance... Coax wallplates do go bad. Isolate gateway from its current power source check for changes. If doing all that you do is on Wi-Fi check for channel interference and crowding. 

 

Knowing more variables of your situation could help.

 

 

 

 

[spudler_t]

-Prior to  my internet speed was great,like 1200-1400 Mbps Down and 200+ Mbps upload but after that it drastically dropped Not the Download it is the same or close to it but the upload now appears to  max out around 64Mbps. Nothing has changed as far as my setup, my computer, my Ethernet cable. ( I run hardwired from my 2.5 Gbps Network card to the Xfinity 2.5 Gbps ethernet connection on the gateway. 

As far as iRacing goes I am absolutely Steller there I have only had connection issues back when Xfinity woudl for some reason restart my gateway at like 03:15 sat morning about 45 min after my weekly NIS race would start, is early but have between 200-400 drivers racing at that time (In Different sessions of course)

After my 5th contact with Xfinity and basically explaining if this keeps happening I will have to end using their service and find something else. It was fixed right then never to happen again.

I noticed again when looking at the specs in the  URL that something is not working correct in the gateway as my Ipv6 is not connected, my 4 Upstream channels only have 2 Showing as well as my 32 downstream channels are down a few as well and when I did a hard reboot then no upload channels were showing up and only 8 downstream ones.

To me that is obviously a issue with the Gateway or Xfinity Software. 

[spudler_t]

well now it shows 2 download and 3 upload . LOL it has come issues.

[jjamez]

Why not just buy your own cable modem?  The ISP ones usually suck pretty bad anyways.  When I had Cox, I always bought my own modem and never had even 1/10th of the problems I heard others complain about.

[CA3LE]

EDIT: scroll down first.  

 

First, here's my levels for comparison.

 

 

Scrolling way over there are a lot more channels

 

 

Maybe your levels are a little too high.  In some cases, on the cable providers end, this is adjusted seasonally to compensate for cable length differences with temperature.  In the summer, overhead cables become longer with the heat and shrink in the winter.  This extra length causes a drop in signal, so it needs to be amplified to a degree.  Then in the winter it needs to be turned back down.  Again, this is all done on the providers end.

 

High levels don't make things better, it can make things much worse.  There's a sweet spot.  Been a very long time since I was an actual cable guy... but when I was, I aimed for downstream power level to be near 0 dBmV.  Mine is usually around -3 to 3 dBmV.

 

There is something you can do about it... actually this is done on my connection right now because my levels were too high when they first installed me.

 

Here's what I would do.  Get a 3 way splitter.  The type is very important... hey, an exsisting splitter could even be the issue.

 

Here's mine for reference.

 

 

Notice, 5-1002 MHz and then on the legs they say 5.5 dB ... that's -5.5 dB signal loss off those legs.  A good thing, sometimes.

 

• 2 way splitters will drop 3.5 dB
• Most 3 way splitters drop 3.5 on one leg and 7 on the other 2.  Because internally it is 2x 2 way splitters.
• To have a nice even 5.5 drop on all legs is kinda special, they didn't have those when I was a cable guy.

 

For yours, maybe drop 5.5 to 7 dB.

 

Get the splitter and cables from a Comcast store.  If they only have 2 way splitters, get 2 of them.  To be safe, only use cables and splitters that come from Comcast.  Plus, they normally hook them up for free.  . -- they really should only want you to use their connections, it saves service calls.  Some cables and splitters are designed for antenna, they don't care as much about the lower and higher frequencies and they don't care as much about ingress/egress.  So yeah, only use the cable providers cables, splitters and amplifiers.

 

I don't think you need this diagram but I drew it for good measure.

 

You may have a splitter along the line somewhere that could be to blame as well.  I would trace all the way from where the cable hits the side of your house to the modem and replace any splitters, barrel connectors (they connect single cables together) or possibly bad cables along the route.

 

Just something I would try myself before calling.

 

BTW, in this case I would only be testing single thread.  I think that's going to be the most helpful.

 

You've seen up to 248 Mbps upload linear before, we know it's possible.  https://testmy.net/db/uYQhpDzSj

 

Please update us on any developments.

 

And I'm sorry it took me a while to get to your topic here, I wanted to take time to properly respond... then days passed.

 

EDIT: Looking again, I wouldn't do this.  It will drop your upload signal level too low.  You want 40 to 45 dBmV for upload power level.  -15 to 15 dBmV for download.

 

Trace back the lines like I said, if you don't find anything then call Comcast.  Show them what you're seeing.  You will have 200 Mbps again soon. 

 

This may help someone in the future.

 

Edited December 7 by CA3LE
on second thought...

[xs1]

20 hours ago, jjamez said:

Why not just buy your own cable modem?  The ISP ones usually suck pretty bad anyways.  When I had Cox, I always bought my own modem and never had even 1/10th of the problems I heard others complain about.

 

Agreed.  

 

https://www.surfboard.com/products/cable-modems/s34/

[cholla]

I have an older Surfboard cable modem.

It has had no problems for many years.

I never even tried a Suddenlink supplied modem.

Now Optimum since they bought Suddenlink.

Still the same modem.

SB6141.

Fast enough for my connection.

It still only get around 200 or some lower Mbps even though it is supposed to be a up to 300Mbps connection.

I have not done a reset since the speed was changed from 200 to 300.

Maybe that would correct the speed.

It is supposed to be able to do 343 Mbps.

I do not have any splitters on my cable & it is internet only.