I have a motorola SB5100 connected to a linksys WRT54G router. Periodically, the connection will drop, and no computers will be able to access the internet. I can still access the router setup page, and under the status tab, the IP address, subnet mask, etc all read 0.0.0.0.
I have tried to update the firmware on the router to 2.0, and cannot figure out if a firmware update of the modem is possible. I recently figured out how to view the modem log, and will try to watch what it says after one of these connection failures.
The only way i have been able to fix the problem is to unplug both router & cable modem for a few seconds.
Where can i begin to troubleshoot this problem? Thanks
SB5100 Questions
Routers as the name implies are Routing the Internet (WAN Side) to your LAN.
Your LAN side is OK so you can communicate with the Router etc.
However you WAN side drops the connection.
1. What type of connection it is (Cable DSL)? MAC authentication, PPPOE?
2. Did you check the Auto Connect, and the Keep Connection Alive in your Router's WAN menu? (it might be called differently in your Router but it would be along this idea).
Your LAN side is OK so you can communicate with the Router etc.
However you WAN side drops the connection.
1. What type of connection it is (Cable DSL)? MAC authentication, PPPOE?
2. Did you check the Auto Connect, and the Keep Connection Alive in your Router's WAN menu? (it might be called differently in your Router but it would be along this idea).
its a cable connection that uses DHCP. as far as i know no option such as "keep connection alive" exists as the connection should never be terminated.
i have also called Charter about this problem, and their logs showed no low signal or connection problems w/ the modem. This is why i thought it could possibly be a problem in communication between the router & modem.
i have also called Charter about this problem, and their logs showed no low signal or connection problems w/ the modem. This is why i thought it could possibly be a problem in communication between the router & modem.
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CristyWebb
Problems with your modem? Don't trust the ISP!
What you need to do is go inside the user interface of the modem and check the signals that you are actually recieving from your ISP.
With your cable modem connected directly to your computer, go into Internet Explorer and type 192.168.100.1 into the address bar. This is the IP adress to your cablemodem and it will allow you to acess the Configuration manager. When you get in there, go to the signals tab and check you DOWNSTREAm signal to noise ratio and power level- then, check your UPSTREAM power level.
Your signals should be:
DOWNSTREAM
signal to noise ratio: 25dB or greater
power level: -15 to +15 dBmV
UPSTREAM
power level: less than 58dBmV, no less than 30dBmV
Sometimes the signal can get disrupted on its way to your actual unit, so the ISP may believe that they are sending the correct signals to you when in fact the signal is being lessened along the way. Also, you can go into the logs and check for Priority 3-Criticals or higher. If you have 3-Criticals or higher, look into the Message section and check for Tx timeouts, sync timing syncronization failures, etc.- the meanings of the messages are relative to your ISP, but they basically mean that you are not recieving the signals or keep alive polls that you should be recieving.
With your cable modem connected directly to your computer, go into Internet Explorer and type 192.168.100.1 into the address bar. This is the IP adress to your cablemodem and it will allow you to acess the Configuration manager. When you get in there, go to the signals tab and check you DOWNSTREAm signal to noise ratio and power level- then, check your UPSTREAM power level.
Your signals should be:
DOWNSTREAM
signal to noise ratio: 25dB or greater
power level: -15 to +15 dBmV
UPSTREAM
power level: less than 58dBmV, no less than 30dBmV
Sometimes the signal can get disrupted on its way to your actual unit, so the ISP may believe that they are sending the correct signals to you when in fact the signal is being lessened along the way. Also, you can go into the logs and check for Priority 3-Criticals or higher. If you have 3-Criticals or higher, look into the Message section and check for Tx timeouts, sync timing syncronization failures, etc.- the meanings of the messages are relative to your ISP, but they basically mean that you are not recieving the signals or keep alive polls that you should be recieving.