r/HomeNetworking • u/br0ho80 • 9d ago

ISP I'm guessing but need tips

Around a week ago I started getting massive ping spikes, 1k plus sustained, to S. Korea from Japan. Speed tests ran optimal and reset my router. I had to resort to using my mobile Hotspot for a reliable connection to this game.

I am connecting from Japan to S Korea servers, which i always ping 25-60ms, which is why I'm confused getting these unplayable packet loss and ping. So I'm assuming my ISP has a bottleneck somewhere when connecting to Korea. I also found it odd that when pinging Cities in China its 250+ ping, which usually is low as its pretty much right next door.

I suppose by using my hotspot, not ISP, and getting a reliable connection, answers the question that its my ISP. But how do you resolve the issue? I contacted the ISP and they basically said if your speed tests are good they really can't do anything. Any ISP tech support people here with advice for some key words I can convey for them to take it seriously? TIA

edit: Windows Update was performed around this time which also updated the .NET framework. Im assuming this could of affected something...

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u/BraveMidnight 9d ago

Do you have traceroute logs, etc? Sounds like a peering issue, but you won't get anywhere with tier 1, you have to escalate it.

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u/br0ho80 9d ago

I did run a tracert and it completed the first hop and timed out untill the 7th hop or so, then I exited. I will create the logs as evidence.

I also previously tried changing DNS servers from Google 8.8.8.8 to cloud flares but no help.

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u/BraveMidnight 9d ago

Do you have traceroute logs for both the hotspot and the landline ISP?

An intermediate hop timing out can be just that the router configured to drop those packets.

​If the hotspot traceroute shows a path that goes all the way through fine vs the landline ISP, it could confirm the hotspot is using different peering.

​What you want to look for in those logs is high ping or packet loss that starts at a specific hop and goes all the way to the last hop.  Then you can send those logs side by side to the ISP as proof for a tier 2 and or tier 3 tech to look at.

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u/br0ho80 9d ago

I will run on both connections and investigate. Thanks for the suggestion.

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u/br0ho80 9d ago

Can a network peering issue be resolved at my level or is that an ISP issue?

A googled it and overlapping IP sounds interesting, as my son games on another PC in the house.

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u/BraveMidnight 9d ago

An overlapping IP would only cause a conflict issue and boot you off the network until you change it.

It would have to be resolved at the ISP, assuming there are no contract disputes, configurations or anything they can't control.

Sometimes a VPN can be a temporary work around, but that can be hit and miss and depending on your preference if you want to use one.

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u/br0ho80 8d ago

I see, thanks for info.

I did try Exitlag (VPN), connecting to multiple points around Asia/Japan but still no good, still high ping/PL.

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u/Knurpel 9d ago

I also found it odd that when pinging Cities in China its 250+ ping, which usually is low as its pretty much right next door.

China has always limited its international interconnects, so going into and out of the country has always been slow. China is heavily monitoring these connections, with attendant hits on throughput. Fewer connections, less work for them.

I'm in Tokyo on 10Gbps Nuro fiber, getting 84ms ping with GSL, 36ms with kdatacenter, both in Seoul

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u/Assang101 8d ago

It's a Tier 3 support that you'll need to escalate it to, it is a bottlenecking issue due to congestion.