7 Messages
2000+ Latency every 10-12 minutes after recent storms
We recently had some storms come through last week and knocked down a lot of trees and power. Once the outages were resolved, I started having intermittent latency issues. The issue occurs roughly every 10-12 minutes where I will go from 10-20ms to 2000+ms. This is causing issues with gaming / streaming / etc. The latency last about 5-10 seconds then clears. All equipment has been rebooted/bypassed/isolated. I can ping my modem gateway IP and the response times are normal (1ms). It only occurs when I ping anything outside of my network on the Xfinity network or beyond. This happens using a wired connection and wifi connection, it does not matter. I've used multiple computers as well.
This is a sample of it occurring:
9:47 PM
Reply from 1.1.1.1: bytes=32 time=1706ms TTL=54
Reply from 1.1.1.1: bytes=32 time=54ms TTL=54
Reply from 1.1.1.1: bytes=32 time=14ms TTL=54
Reply from 1.1.1.1: bytes=32 time=13ms TTL=54
Reply from 1.1.1.1: bytes=32 time=2167ms TTL=54
9:58 PM
Reply from 1.1.1.1: bytes=32 time=1918ms TTL=54
Reply from 1.1.1.1: bytes=32 time=34ms TTL=54
Reply from 1.1.1.1: bytes=32 time=15ms TTL=54
Reply from 1.1.1.1: bytes=32 time=16ms TTL=54
Reply from 1.1.1.1: bytes=32 time=2553ms TTL=54
10:09 PM
Reply from 1.1.1.1: bytes=32 time=2650ms TTL=54
Reply from 1.1.1.1: bytes=32 time=67ms TTL=54
Reply from 1.1.1.1: bytes=32 time=13ms TTL=54
Reply from 1.1.1.1: bytes=32 time=2581ms TTL=54
10:21 PM
Reply from 1.1.1.1: bytes=32 time=2471ms TTL=54
Reply from 1.1.1.1: bytes=32 time=56ms TTL=54
Reply from 1.1.1.1: bytes=32 time=2586ms TTL=54
10:32 PM
Reply from 1.1.1.1: bytes=32 time=2611ms TTL=54
Reply from 1.1.1.1: bytes=32 time=77ms TTL=54
Reply from 1.1.1.1: bytes=32 time=2586ms TTL=54
10:43 PM
Reply from 1.1.1.1: bytes=32 time=2175ms TTL=54
Reply from 1.1.1.1: bytes=32 time=58ms TTL=54
Reply from 1.1.1.1: bytes=32 time=12ms TTL=54
Reply from 1.1.1.1: bytes=32 time=1980ms TTL=54
user_a76899
7 Messages
2 years ago
(edited)
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user_a76899
7 Messages
2 years ago
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EG
Expert
•
110.8K Messages
2 years ago
First. A modem can't display upstream channel SNR values. Those can only be read from their end at the CMTS. You must be referring to that channel's power level at 20.2 dB.
That said. FWIW, this is the very first time here that I've seen the usage of an OFDM channel on the upstream with Comcast. Looks like they are starting to roll it out now and it is likely to be experimental at this time and therefore has bugs.
Keep in mind that I am NOT saying that this isn't the cause of the problem. What I am saying is that if you'll notice, that channel isn't actually locked in. When a channel is not locked in, the power level reading will not be accurate. Also, in the case of a downstream channel that is not actually locked in, not only will the power level reading be inaccurate, but so too will the SNR reading. Just sayin'.
(edited)
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