Latency Issues with Hitron CGN3

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I've Been Here Awhile
Posts: 2

Re: Latency Issues with Hitron CGN3

Thanks for the detailed reply and suggestions! Just curious, this particular modem model never caused me any issues from before and I've been using it for years. Did something change on Roger's network?

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Re: Latency Issues with Hitron CGN3


@wcxf wrote:

Thanks for the detailed reply and suggestions! Just curious, this particular modem model never caused me any issues from before and I've been using it for years. Did something change on Roger's network?


Yes, the CMTS which the modem connects to was changed in the latter half of last year from a Cisco CMTS running 20 channels to a Casa Systems CMTS running 32 channels.  The CGN3 can run 24 channels down, so you most likely went from 20 to 24 channels which increases the processing load to some degree, maybe enough to become noticeable on the CGN3.  Rogers also enabled IPV6 across the network.  The CGN3 works for IPv6 in bridge mode. In gateway mode, it requires a factory reset before the IPV6 address will be seen in the modem's WAN IP address block in the STATUS page and in the connected devices.  To test for IPV6 capability, go to ipv6-test.com   That site will tell you if you have an IPV6 address assigned to your pc.  The final score will also tell you if the pc is set to run IPV6 if you happen to achieve a score of 19/20 right off the bat.  Anything less than that might require an IPV6 exemption added to the pc.  



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I'm an Enthusiast
Posts: 954

Re: Latency Issues with Hitron CGN3

From what I read on the ea forums nhl17 or all others nhl games don't run well on IPv6 could that be a reason why there's a issue on this game when playing online ? Can anyone confirm this please
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Posts: 954

Re: Latency Issues with Hitron CGN3

@Datalink what's needed for p2p online gaming is it IPv4 or IPv6 been hearing people on Rogers with IPv6 having issues with nhl but guys on bell are not there still on IPv4 is that true ?
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Re: Latency Issues with Hitron CGN3

Don't know about the issue part of your question, you would have to do your own research of the game forums, but as for Bell, yup, they don't run IPV6 and from what I've read, there is no apparent plan to introduce IPV6, at least none that has been released to the public.  That leads to an interesting question of whether or not Bell will have to use Carrier Grade NAT, which is another topic for discussion.  If you run the CODA-4582 in Bridge mode with the TP-Link router, you should be able to leave IPV6 disabled. 



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Re: Latency Issues with Hitron CGN3

I'm having latency issues. Rogers told told me to write here....
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Re: Latency Issues with Hitron CGN3

You were chatting with tech support and they gave up and sent you here?  Just wondering .....



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Re: Latency Issues with Hitron CGN3

Hi,


Advance warning – I am not a particularly technical person; I understand some of the general terminology but not a lot of the deeper networking specifics.


My problem: like many families these days, three members of our household are working or learning from home. While our latency appears to be OK most of the time, we are having frequent enough latency spikes to disrupt video conferencing calls – even if only one of us is video conferencing.


Even if none of us are video conferencing (just browsing, doing email, etc.), doing a command-line ping test to lens.l.google.com (recommended by Google as part of their Google Meet tests) shows an average of 40ms but jumping up to 200+ (sometimes as high as 800) at least once or twice in a 5-minute test. When that happens, it stays that way for anywhere from 2-10 seconds.

 

That’s even without doing video conferencing. When one of us is using Teams or Google Meet, it manifests as freezing or stuttering of both the audio and the video, often for 10 seconds or more. And of course, the latency problems are even worse if two or more of us are video conferencing at the same time. But again, the spikes can happen even when people are just browsing (no video) or checking email.

 

My setup:

  • Rogers Ignite 75 service
  • Hitron CGN3 modem (provided by Rogers) in bridge mode
  • D-Link DIR-882 router
  • Two TPLink RE450 range extenders – used by devices like game consoles that are normally off during the day, but *not* directly used by the laptops are using for work/school.
  • Our laptops are connected directly to the DIR-882 WiFi (not the TPLink extended WiFi) – two of them on 2.4GHz, one on 5.0GHz (although we’ve tried switching between 2.4GHz and 5.0Ghz)
  • Rogers Smart Home Monitoring router (which I believe is configured just as an access point) connected to the DIR-882 by wired Ethernet (but I have tried disconnecting it, and it made no difference to the problem)
  • Roughly 15 devices connected to the D-Link (laptops, phones, tablets, printers, Chromecast, etc.) but only the laptops usually being “actively” used (e.g. nobody else is watching Netflix or playing online games when the problem is happening).

I’d appreciate any advice you can give on how to troubleshoot (or even better, solve) this. I can’t even tell if the problem is my WiFi or my Rogers internet connection. I have tried connecting my laptop via wired Ethernet directly to the Rogers modem (which is still in bridge mode) as the only active device and performing the recommended tests (results below) – and while the results look good for short periods, longer versions of the same tests still have brief spikes (but the spikes are definitely less frequent than I see with multiple devices on WiFi).

 

The results:


Ping (500 times) last night
Ping statistics for 172.217.164.196:
Packets: Sent = 500, Received = 500, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 8ms, Maximum = 35ms, Average = 11ms


TraceRT last night

Tracing route to www.google.com [172.217.164.196]
over a maximum of 30 hops:
1 12 ms 14 ms 12 ms 173.32.236.1
2 11 ms 11 ms 17 ms 24.156.150.121
3 15 ms 11 ms 11 ms gw02.wlfdle-ge7-1-2.mtnk.phub.net.cable.rogers.com [69.63.248.5]
4 13 ms 13 ms 14 ms 209.148.235.22
5 * * * Request timed out.
6 13 ms 13 ms 16 ms 74.125.244.161
7 19 ms 12 ms 13 ms 216.239.42.159
8 12 ms 12 ms 12 ms yyz12s04-in-f4.1e100.net [172.217.164.196]
Trace complete.

 

Ping (over a 2-hour span) today
Ping statistics for 2607:f8b0:400b:800::2004:
Packets: Sent = 6453, Received = 6452, Lost = 1 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 9ms, Maximum = 513ms, Average = 12ms

 

As you can see, the ping test was fine last night, although the TraceRT had one timeout…but when I ran a new ping test this afternoon over a longer span, there was 1 lost packet and 4 packets (out of over 6400) that had latency of 510-513ms. (The 4 packets with latency were not bunched together – they were spread out over the 2 hours). BTW, I have no idea why pinging www.google.com showed an IPV6 address today and IPV4 yesterday, other than the fact that I used -t instead of -n so it would run indefinitely today until I stopped it.


I don’t mind investing in a mesh Wifi system (e.g. Google Nest Wifi) if that will solve the problem, but I don’t want to do that only to discover I still have the same problem because the root cause is my Rogers connection or something else.


Thanks,
Mike

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Re: Latency Issues with Hitron CGN3

Hello, @MikeVan56.

 

Welcome to Rogers Community Forums! 😃

 

Thank you for your detailed post and the ping and traceroute results. The results look normal except for those high pings you've observed while pinging the IPv6 address. Figuring out the root cause of such occasional high pings can be tricky. 

 

Since when are you experiencing issues with video conferencing? A mesh WiFi system may not resolve the problem you are experiencing. 

 

Can you check to see if QoS and SIP are enabled on your router (DIR-882)? You may want to disable them to improve the video conferencing experience. 

 

Please keep us posted. 

 

Cheers,

RogersMoin


 

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I've Been Here Awhile
Posts: 2

Re: Latency Issues with Hitron CGN3

Hi @RogersMoin,

 

I really can't tell how long the problem has existed, as we hadn't really been using video conferencing very often at home until school restarted in September. I did do a few Zoom calls and one Google Meet in the May-August period and had hiccups with almost all of those, but I did them rarely enough that I hadn't really dug into the problem. My best guess is that the latency spikes have been a problem for a long time (maybe more than a year), but I just hadn't been doing activities for which it's so problematic until recently. 

 

>>Can you check to see if QoS and SIP are enabled on your router (DIR-882)? 

 

I don't think this could be the cause of the ping spikes in my reported tests, as those were all done when wired directly to the modem (which was in bridge mode) -- so the router (DIR-882) was not part of the chain, and my laptop was the only device connected to the internet. 

 

That said, I did just check the DIR-882 and while QoS was off, SIP was enabled. I've turned it off (as mentioned, I get even bigger spikes over WiFi than I do directly wired to the modem, so this might at least improve the WiFi experience), but I feel like that's unlikely to be the root cause. 

 

What else can we try to identify the root of those directly-wired-to-modem pings?

 

Thanks,

Mike