- Joined
- Nov 11, 2010
So...I have a pretty basic network layout in my apartment (See pic)
Cable Modem and Router are on the same UPS and are the only devices plugged into it. I did not run the cable for the cable modem through the coax port on the UPS though.
I'm having some major problems which are causing me major headaches.
Problem:
Every single day my connection will drop for anywhere from 5 seconds to 30 seconds then re-connect. It repeats this several times in a row, and it occurs several times a day. I've done the ol' "power cycle the modem and router" bit and it never improves. Sometimes it goes away for hours, most times, though, it continues within a couple minutes after powering everything back up.
What I'm looking for are recommendations/advice on how to check to see where the problem actually is...
Background info (if you want to read it)
Troubleshooting Efforts Thus Far:
1 -- I replaced the previous router (a TP Link 10/100) with the Asus because of this issue. No Change. This tells me it isn't the Router that is at fault.
2 -- Thinking it could be the modem, I purchased a new Cable Modem (Motorola 6120) and have it ready to swap into the old one's place. Since swapping the modem out requires a call to Comcast I have not yet done this...but it is something I can do today
3 -- I checked my Signal Levels on the Cable Modem by accessing the modem's management interface, and the values look to be within the acceptable ranges, but they are close to the high end of the range of acceptable levels.
Cable Modem Signal Levels:
Signal to Noise Ratio is ~37dB
Downstream/Upstream is 41dB/9dB (I may have swapped the two numbers...)
(the 9dB entry is close to the 10dB limit, according to Comcast)
I've tried looking through the cable modem's logs and I'm seeing some T3 errors and T4 errors. Unfortunately, the entries are not recorded in an easy to understand syntax so I'm not sure what to make of the entries...and it's compounded by the fact that power cycling the cable modem causes the date to revert to 1970(!!!)
Are there any sort of tester devices I can connect inline to record the connection drops/signal levels?
What I hope to do with my troubleshooting is eliminate the possibility that the dropped connections are related to the inside wiring or my equipment so Comcast doesn't just blame me/my equipment.
Cable Modem and Router are on the same UPS and are the only devices plugged into it. I did not run the cable for the cable modem through the coax port on the UPS though.
I'm having some major problems which are causing me major headaches.
Problem:
Every single day my connection will drop for anywhere from 5 seconds to 30 seconds then re-connect. It repeats this several times in a row, and it occurs several times a day. I've done the ol' "power cycle the modem and router" bit and it never improves. Sometimes it goes away for hours, most times, though, it continues within a couple minutes after powering everything back up.
What I'm looking for are recommendations/advice on how to check to see where the problem actually is...
Background info (if you want to read it)
Troubleshooting Efforts Thus Far:
1 -- I replaced the previous router (a TP Link 10/100) with the Asus because of this issue. No Change. This tells me it isn't the Router that is at fault.
2 -- Thinking it could be the modem, I purchased a new Cable Modem (Motorola 6120) and have it ready to swap into the old one's place. Since swapping the modem out requires a call to Comcast I have not yet done this...but it is something I can do today
3 -- I checked my Signal Levels on the Cable Modem by accessing the modem's management interface, and the values look to be within the acceptable ranges, but they are close to the high end of the range of acceptable levels.
Cable Modem Signal Levels:
Signal to Noise Ratio is ~37dB
Downstream/Upstream is 41dB/9dB (I may have swapped the two numbers...)
(the 9dB entry is close to the 10dB limit, according to Comcast)
I've tried looking through the cable modem's logs and I'm seeing some T3 errors and T4 errors. Unfortunately, the entries are not recorded in an easy to understand syntax so I'm not sure what to make of the entries...and it's compounded by the fact that power cycling the cable modem causes the date to revert to 1970(!!!)
Are there any sort of tester devices I can connect inline to record the connection drops/signal levels?
What I hope to do with my troubleshooting is eliminate the possibility that the dropped connections are related to the inside wiring or my equipment so Comcast doesn't just blame me/my equipment.