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post #1 of 6 (permalink) Old 07-12-2020, 12:33 AM - Thread Starter
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large rhythmic spikes in network traffic

Can you guys make heads or tails of this?

I have cable internet, a Netgear CM600 modem, and an Asus RT-AC88U router.

What happens at random times during the day, is streaming services will start getting jammed up, if im gaming, i'll start getting packet loss, to the point of dropping, all devices on the entire network are effected when this happens. I have ruled out all of the devices on the network by removing them, and observing this same pattern of traffic with only the router and the modem online together.

If I reset the modem, the problem goes away, sometimes for a day, sometimes less.

I think I need a new modem, I ordered one, not here yet. I'm curious if anyone has run into anything like this before.

Below is what it looks like when its acting up:


i7 6700k, evga 1080ti, evga z170 mb

Last edited by B737; 07-12-2020 at 07:51 AM.
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post #2 of 6 (permalink) Old 07-12-2020, 01:24 AM
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looks like traffic shaping to me. Have you updated drivers?

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post #3 of 6 (permalink) Old 07-12-2020, 07:49 AM - Thread Starter
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Thanks for your input
My PC is up to date, and it has two NICs, ive tried them both independently. The firmware on the router is up to date, and im not sure there is anything i can do for the modem firmware since thats handled by the ISP (even though i own the modem). The traffic will look like this if i remove all the devices off the network, leaving only the router and the modem, it will still continue on like that. I will google traffic shaping and see what i come up with for things to try

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post #4 of 6 (permalink) Old 07-12-2020, 08:07 AM
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What's in those packets? Who sending them and where?

I've had a similar but not the same problem once on a large network where the network would spam me in 1 moment = at once with requests for replies for what seemed to be Windows networking sharing/discovery the basic networking Windows feature that used to be enabled by default so that Windows PCs can connect to each other to browse files and what not, and my PC would then reply to all the requests again at once... this would then be caught by the networking spyware of the network administrator and classified as unwanted behavior and disconnect my machine. So basically the network was DDoSing me but the admin thought I'm the culprit, have some virus on the machine, etc. until I showed him logs of the network traffic he's letting to reach my machine at once and that the replies are legit.

Sometimes network traffic is only some waste that needs to be eliminated.

I've never had a good experience with QoS or traffic shaping, I think it takes an expensive powerful machine to do it right and only ISPs have the bank to get them. The home use networking devices are a joke for the most part when it comes to processing performance.

You gotta figure out what it is and where it's coming from.
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post #5 of 6 (permalink) Old 07-12-2020, 08:11 AM - Thread Starter
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How can i find out what those packets are, or where they are going?

in the router, QoS is turned off

I thought for sure it was malware on my PC. So I turned the PC off, and the traffic remained, I then physically removed each device from the network and the traffic was still there. Once I reset the modem, all is fine. Would an overheating modem do this?

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Last edited by B737; 07-12-2020 at 08:37 AM.
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post #6 of 6 (permalink) Old 07-12-2020, 08:41 AM - Thread Starter
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also.... Since the behavior exists while my desktop PC, and other clients are physically off of the network, I'm assuming that means that nothing on the network is compromised. Is that a safe assumption? example; if my PC were compromised, and I removed it from the network then the traffic pattern would stop as there would be no destination or malicious exe running

This is why I systematically removed each client one at a time to try and determine the local destination if there was one.

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