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Significant Packet Loss

New Poster

Significant Packet Loss

Hi There!

 

Been having trouble with some online games the past few weeks, and after running a packet trace with WinMTR, it seems a lot of packet loss is occurring on Comcast channels prior to the packet being handed off to the game servers.  

 

I have a couple WinMTR runs linked below that show the packet loss...

 

https://pastebin.com/kSszAHFj

https://pastebin.com/9isjbaic

 

I am in Chicago, connecting to servers in Washington DC.

 

Any ideas why this might be occurring?

 

 

Expert

Re: Significant Packet Loss

Start here;


https://forums.xfinity.com/t5/Your-Home-Network/Connection-Troubleshooting-Tips/m-p/1253575#M94474

 

Post the requested info from here;


https://forums.xfinity.com/t5/Your-Home-Network/Information-Requested-for-Connection-Related-Posts/m...



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New Poster

Re: Significant Packet Loss

Thanks EG.  See that info below.  

 

Still reading through the first link, but everything so far seems in order.

 

Modem Signal Levels:  https://i.imgur.com/NJw9UY8.png

 

Modem Logs:  https://drive.google.com/file/d/1aqT7f8dlXxRKavOvuCSc8pT8vA501IH_/view?usp=sharing

 

Modem:  Netgear CM500

Router:  Netgear Nighthawk R7000

Contact Support?  Yes via chat.  Had me reset the modem, and unplug/replug the coax cable from the modem and wall.

Lights:  All green.

Highlighted
Expert

Re: Significant Packet Loss

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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New Poster

Re: Significant Packet Loss

Thanks EG.  Right now I have the wall coax going into a 3-way splitter for some reason.  Only need 2 (the 3rd was empty).  

 

For testing, I routed the wall coax straight into my cable modem, bypassing any splitter or tv cable box.

 

New Modem Signals here:  https://i.imgur.com/IY8tqIc.png

It does seem like Upstream Power dipped.

 

However unfortunately it does seem like the issue persists.  Updated trace route here showing packet loss along every stop:  https://pastebin.com/uArxTcND

 

Going to get a proper splitter (none of the ones you mentioned) and will most likely have to get a tech involved.

 

Let me know if anyone has other ideas!

 

Expert

Re: Significant Packet Loss

Yep. The upstream looks good now. There may not be anything wrong with your splitter. It may be just excess attenuation or the incoming feed signal from the system may be on the weak side in the first place. Looks like you still have the packet loss. Is this with a WiFi connection ? Bear in mind that it could also be a traffic congestion / capacity problem on your local system.



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New Poster

Re: Significant Packet Loss

Thanks EG.  Splitter back in and the powers spike back up again, so I'm going to get a new splitter (probably BAMF) and try that. Keeping wall-direct for now.

 

No this is not a wireless connect.  Wired.  But I do have other devices wirelessly connected to the same router.

 

If the new spliter doesn't fix any issues, I'll most likely see if a tech can come out anyway.

Expert

Re: Significant Packet Loss

See if you can make it a two-way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed to feed everything else.

 

Here are some quality brand splitters that Comcast actually uses in different market areas;

Antronix CMC2002H 2-Way Splitter: http://www.amazon.com/Antronix-CMC2002H-2-Way-Splitter/dp/B001E4OH1E

Regal 2 WAY 1 GHZ Splitter: http://www.amazon.com/DIG702867-Regal-WAY-GHZ-SPLITTER/dp/B0018BQMUM/ref=sr_1_2?s=electronics&ie=UTF...

Extreme Broadband BDS102H 2-Way Digital Coax Splitter: http://www.amazon.com/EXTREME-DIGITAL-PERFORMANCE-CABLE-SPLITTER/dp/B007YV0UQW

Holland 2-way horizontal splitter 5-1000 MHz with ground.http://www.3starinc.com/holland_2-way_horizontal_splitter_5-1000_mhz-w-ground.html

Sv-2g 2-way Splitter 5-1000mhz: http://www.amazon.com/Sv-2g-2-way-Splitter-5-1000mhz-Sv2g/dp/B003TH36CK

Good luck !



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New Poster

Re: Significant Packet Loss

Thanks for the rec's!  Don't think I can pull it straight from the pole, as I live in an apartment building.  But still helpful.

 

Thanks again!

Expert

Re: Significant Packet Loss

O/k well it really means straight from the feed that is available to you / your closest access.



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