2 Messages
2000+ Latency every 10-11 mintues after storms knocked out power
We had storms that knocked out the power for a few hours a few months ago. Once the power came back on, I went back to gaming and noticed that every 10-11 minutes, we would have a considerable latency spike of 2000+ms lasting for 5-10 seconds. Then, the latency would return to normal, and the 2000+ms latency spikes would reoccur every 10-11 minutes. It has been a few months since this first happened, and it has become incredibly annoying, primarily when gaming. I have done everything I can to reset/restart all my devices and routers, changed the cables, etc... I ran PingPlotter, which now is clearly showing that the issue is with this ISP address (Specifically the server named be-501-arsc1.pompanobeach.fl.pompano.comcast.net). It is showing 90%+ packet loss almost consistently, even during or not during the latency spikes, and I am now trying to figure out what to do and how I could get this fixed. I have tested this with all my devices, whether wired or not.
BruceW
Gold Problem Solver
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25.9K Messages
22 days ago
The target hop does not show any packet loss, so the "loss" at the intermediate hops is likely more apparent than real, and probably not significant. Please see https://www.dslreports.com/faq/14068.
Interpreting trace results is tricky. What appears to be "late" or is reported as "lost" could mean 1) the packet did not reach or was delayed in reaching that hop, or 2) the router at that hop didn't reply or was slow to reply, or 3) the reply from that hop didn't make it back or was delayed in making it back to the trace program.
The fact the hops beyond than ones you are concerned received the trace packets indicates that the router at that address is doing its job: forwarding data packets. That means the router's occasional delay in or failure to respond to trace packets, while annoying, is most likely not actually slowing down data transfer. If it was we'd see high RTT values and/or packet loss in subsequent hops.
Are you connecting over Wifi? In any event, the 221ms "max" RTT in hop #2 is an awfully long time for packets to travel from an in-home device to the first Comcast/Xfinity hop and back. That number should be 10-20 at most. You might want to look into that.
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user_a8swve
2 Messages
21 days ago
Those results were from my laptop, which is connected to the wifi. These results are from my PC, which is connected via ethernet.
https://imgur.com/a/DIH4lbp
https://imgur.com/a/1qLy2aq
These are two pictures of the latency spikes around 10 minutes apart. I don't understand why the average RTT would be a lot higher on one over the other, but in both, a few of those Comcast servers have 120ms+. Also, what would cause the RTT to be so high, and how would that correlate to the latency spikes?
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BruceW
Gold Problem Solver
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25.9K Messages
21 days ago
The variations in the traces suggest an intermittent problem with the link between your modem or gateway and Comcast's network. Network connection problems like this are often due to poor coax connections or damaged coax cable, usually in or near your home. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power. The problem could be further "upstream", but this is where we start.
Please post your Internet plan speed and the following information from your modem or gateway (from http://192.168.100.1 or http://10.0.0.1):
Copy and pasted text is preferred over images. Be aware that, if you post any images, your message will be made Private for a time, as all images must be approved by the Forum Moderators before the messages containing them become generally visible.
If you can't find the problem or you'd rather have Comcast take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
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