Frequent Visitor
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15 Messages
High first-hop latency and packet loss
Is there something that can be done about high latency and jitter at my first-hop on Comcast's network? I've been noticing this problem nightly for at least a month, where I'll see extreme latency and packet loss at the first hop outside my home. I'm testing using a windows 10 PC that's connected to my firewall with a 1-gig ethernet connection. The same ping to my local firewall is consistent at <1ms latency, so I'm fairly confident it's not contributing to the problem. This is causing problems with applications like remote desktop, which I'm using far more these days (as I assume many are).
EG
Expert
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114.3K Messages
6 years ago
Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.
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Krausen
Frequent Visitor
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15 Messages
6 years ago
I just tried contacting Comcast chat support and found that they aren't offering that at this time.
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Krausen
Frequent Visitor
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15 Messages
6 years ago
It looks like my pictures got approved.
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EG
Expert
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114.3K Messages
6 years ago
Post the upstream power level numbers as well.
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EG
Expert
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114.3K Messages
6 years ago
Can't see your latest pic.
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Krausen
Frequent Visitor
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15 Messages
6 years ago
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Krausen
Frequent Visitor
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15 Messages
6 years ago
How about this:
https://imgur.com/a/tA91psn
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EG
Expert
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114.3K Messages
6 years ago
The downstream power is high. Is there an amplifier on the coax line leading to the modem ? If so, try removing it. If not, try using a 3 dB signal attenuator pad like this one on the back of the modem;
https://www.amazon.com/In-Line-Attenuator-3-dB-1/dp/B0002ZPIUU
You could try a 6 dB one as well. Not certain that this is the direct cause of the problem. YMMV. Good luck !
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Krausen
Frequent Visitor
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15 Messages
6 years ago
Does anyone from Comcast actually read these forums? I'm wondering if I'm just wasting my time here.
I did (finally) get in touch with an agent using chat. He blamed my wireless connection (I'm not using wifi), before providing me this gem:
"7:20:03 PM Ann Marie : ’Im sorry that we haven't been able to get the MODEM working, but after performing [list troubleshooting steps taken] we've determined that the modem is working and responding to our efforts. "
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EG
Expert
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114.3K Messages
6 years ago
Have you tried an attenuator ?
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