Router jitter

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I've Been Here Awhile
Posts: 3

Router jitter

I found this really interesting problem with my network that I cannot fix. My ISP is Rogers (Canada) and their lovely tech team have not been able to even notice that my network has an issue.

This is my problem:

When I game online there is significant rubber band and random intervals (different games different regions)

When I test in pingtestDOTnet i get an average of 50-60 ping and a range of 18 to 59 jitter! (yea jitter is bad this is bad)

What test I have done:

Almost every kind of test I have done and everything points to the router/modem combo.

I tested a cat5 cable and pinged 192.168.0.1 from my computer 192.168.0.10 and the results were all over the place. It went from <1ms to 30ms (WOW I found then issue right? mm kind of)

After feeling like is struck gold I decided to not get carried away and test different cables, same result. Different computers? Same results. Test on a router that i had laying around? All my pings were <1ms.

This tells me that there is a problem with the modem. I decided to call my ISP and request a modem change, this should fix it right? I went to the store got a new modem. Got home and installed it. Tests with a ping from my pc to my gateway same results 1ms-30ms fluctuations, I’m sad.

I decided to give this new modem a chance. Took it to my room (no coaxial cable to bring, so this is an offline test and any outside factors should be eliminated) plugged the modem to my computer with a 3ft brand new cat5 cable and ...... same fluctuation 1ms-30ms. I do not understand what’s going on. I tested everything and even swap modems and the problem is still there. My speed and delays are fine but there is jitter in my connection and cannot play most online games without lag spikes or rubber banding.
Someone please send help!

I finally got my ISP to put their engineers on my case but have no hope. (This kind of issue is hard to observe from the outside because delay I always expected in the remote tests)

My Equipment:

Modem/Router combo: Hitron cgn3
Internet package: 250mbps down 20mbps
MOBO from main testing machine: Asrock Fatal1ty z170 [/B]

Feel free to ask and suggest testing methods and solutions. I am not foreign to networking and technical terms so go ahead and talk nerdy to me.

 

 

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Resident Expert
Resident Expert
Posts: 6,771

Re: Router jitter

Simple solution, as you're running the 250/20 service is to trade in the modem for a CGN3ACSMR, which I believe is the "RocketModem".  There should be no additional cost as this is the modem that should be paired with your level of service.  The mods can correct me if I'm wrong on my details.

 

If your friend is also running the 100/10 or 250/20 service and not seeing these issues, then he or she is running the CGN3ACSMR.



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Resident Expert
Resident Expert
Posts: 6,771

Re: Router jitter

Latency to and thru the modem is a well known issue with the Hitron modems.  There are three modems, as is seen by the product sticker at the back of the modem.  They are the CGN3, CGN3ACR, and CNG3ACSMR.  The CGN3ACSMR had a firmware update at the end of May 2015 to resolve the latency issues and others which made the modem unsuitable for gaming.  That firmware version, 4.5.8.16 made a considerable, positive difference, in terms of resolving the vast majority of issues.  Its not perfect when it comes to the ping latency, but its greatly improved, much much closer to what you would see with a router.  Very soon, version 4.5.8.20 will be released to resolve IPV6 issues that have been observed since IPV6 was enabled across the network, along with a few bug fixes that resolve 4.5.8.16 issues. 

 

The CGN3 and CGN3ACR have not had any updates to resolve the latency issue, so, what you see is the typical baseline behaviour of the modem.  Note that this is not restricted to the Hitron modems.  The Cisco DPC-3848 displays similar results. 

 

If you look at the following thread you can see the results for the pre 4.5.8.16 firmware, and after deployment along with the Cisco DPC3848. 

 

https://www.dslreports.com/forum/r30126389-Is-Rogers-offering-Cisco-dpc-3848-yet?search=DPC3848

 

So, at the present time, if you game online, you should be running a CGN3ACSMR with firmware version 4.5.8.16 to start, moving up to 4.5.8.20 when it's released across the network. 

 

Log into your modem and check the software (firmware) version shown on the STATUS page.  If you have the previous version, 4.4.8.13, or 4.4.8.14, that would definitely explain your observations.  It takes 48 to 72 hours after the modem goes online for the Cable Modem Termination System (CMTS) to load version 4.5.8.16 onto the modem.



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I've Been Here Awhile
Posts: 3

Re: Router jitter

Thanks for rhe qucik answer.

 

I have the CGN3 and:

 

HW: 1A

SW version: 4.2.4.5 

 

So what would be a solution for me? How is this happening to me when friends of mine have the same service and router and do not experience this delay between pc to gateway. Its a internal gateway why would it even be a delay, even worse a fluctuating delay. 

 

Im gonna include the pings from my computer to the gateway while the coax cable was disconnected and the pc was connected with a 3ft brand enew cable. This fluctuation is unacceptable imo.

 

Pings: 192.168.0.10 to 192.168.0.1

https://gyazo.com/e9e1b6c6fb98e4d9b4116c3893963bdb

 

HW and SW version: 

https://gyazo.com/f41e6adeae44b9f5cf3176fdef2de998

Highlighted
Resident Expert
Resident Expert
Posts: 6,771

Re: Router jitter

Simple solution, as you're running the 250/20 service is to trade in the modem for a CGN3ACSMR, which I believe is the "RocketModem".  There should be no additional cost as this is the modem that should be paired with your level of service.  The mods can correct me if I'm wrong on my details.

 

If your friend is also running the 100/10 or 250/20 service and not seeing these issues, then he or she is running the CGN3ACSMR.



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I've Been Here Awhile
Posts: 3

Re: Router jitter

Ok thanks fo the help. I am gonna try that.