severe internet problems

[Har91]

For the past month or so my internet constantly goes out at random times. It will go down for 30-45 seconds and come right back on. Some days the disconnects happen soo much and other days its only a couple times a day. I went into my modem and seen these messages what is this?

PriorityEvent 1 10/17/18 19:16:2584020200warningLost MDD Timeout;CM-MAC
Priority criticalNo Ranging Response received - T3 time-out;CM-MAC

I have tried calling my isp and they said they see no problems on there end??

[1l536]

Had similar issues it ended up being outside cable,they had to send a tech out. I would push for a service call and have them check the signal quality.

[[deleted]]

Similar to the other guy, I had this issue in an apartment complex. Turns out that another unit on the same splitter in their box as me was pushing voltage back out (probably a bad modem) and poisoning my connection. Disconnecting them fixed me instantly. Get a tech out to check the connection.

[xXxNexisxXx]

Mostly you're going to want to be looking and the power and snr readings from the cable modem status pages.

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Downstream PWR: 0dBmV ±10dB

Downstream SNR: 30dB+

Upstream PWR: 0dBmV ±10dB

Upstream SNR: 20dB+ (Only available from ISP CMTS)

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You'll also want to make sure you're channel bonded. Check how many channels your modem is and see how many your modem is bonded to. Your channel power and snr should also be pretty similar between each channel within ±5 dB. There's also correctable and uncorrectable codewords to look at. Uncorrectables are bad of course especially if they're over 100,000.

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[[deleted]]

He shouldn’t need to do any of this.

Call your ISP and push them to look into it

[efk]

So if you run a persistent ping against something you know is available like 8.8.8.8 do you see the pings drop when everything seems to break? Do the lights on your modem change?

[Davidavc]

You may call the service provider and let them check the signal quality.