[Connectivity] Cable Modem/ Router Errors in Comcast HSI http://www.dslreports.com/forum/r20467338 en Mon, 13 Oct 2008 04:05:28 EDT Mon, 13 Oct 2008 04:05:28 EDT Re: [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20471510 EG :
said by Anon123 :

(if you have an eMTA you need to remove the battery as well.)
To my experience, that is not routinely necessary..

The reset button on the rear will reset the modem and therefore flush its MAC address cache.

The only times that I have seen it necessary to "remove the battery" is when there is a hardware issue / defect with the reset button itself, and/or, its associated circuitry.]]> http://www.dslreports.com/forum/remark,20471510 Mon, 12 May 2008 18:17:43 EDT Re: [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20468085 anon :
said by raccettura See Profile :

said by littleluna :

Probably, but I'm not sure what the term "powercycling" is. Is that when you restart the modem while it's connected to the router?
Yup.
To clarify powercycling is when you pull the power out of the back of the modem (if you have an eMTA you need to remove the battery as well.) Some modems have "power" buttons on them that really only put the modem into a standby mode and do not actually reset the modem.]]> http://www.dslreports.com/forum/remark,20468085 Mon, 12 May 2008 01:40:29 EDT Re: [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20467633 raccettura :
said by littleluna :

Probably, but I'm not sure what the term "powercycling" is. Is that when you restart the modem while it's connected to the router?
Yup.]]> http://www.dslreports.com/forum/remark,20467633 Sun, 11 May 2008 23:02:00 EDT Re: [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20467524 anon : Probably, but I'm not sure what the term "powercycling" is. Is that when you restart the modem while it's connected to the router?]]> http://www.dslreports.com/forum/remark,20467524 Sun, 11 May 2008 22:39:10 EDT Re: [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20467461 EG : Have you tried powercycling the modem after connecting the router to it ?]]> http://www.dslreports.com/forum/remark,20467461 Sun, 11 May 2008 22:23:38 EDT [Connectivity] Cable Modem/ Router Errors http://www.dslreports.com/forum/remark,20467338 anon : Hi Everyone. I've been struggling with my Cable Company and my many routers that I have purchased (3 to be exact). I'm using a Surfboard 5120 Motorola modem that my cable company has provided me and a Netgear Wireless G router and I CAN'T GET MY CONNECTION TO STABILIZE WITH ONE OF MY ROUTER CONNECTED TO IT. I have called my cable company and they say it's the router... so I called my router's 1-800 number and they say it's my cable company.
I'm getting a:
"IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast"
message when I log into my modem's IP Address. I've never seen this message before unless the router was failing but now I'm seeing it all the time, even without the router connected to the modem and I'm still ABLE to access the internet too. However, this is not the case when I connect the router in series with modem. I've also checked all of my signals and they are fine:

Downstream...............................Value
Frequency................................687000000 Hz
Signal to Noise Ratio....................35 dB
QAM......................................QAM256
Network Access Control Object............ON
Power Level..............................-4 dBmV


Upstream.................................Value
Channel ID...............................4
Frequency................................31000000 Hz
Ranging Service ID.......................2741
Symbol Rate..............................2.560 Msym/s
Power Level..............................43 dBmV

I don't know what to do and I don't know who to believe but I can't access the internet via my router only through my modem and I don't know why.
PLEASE HELP!!!]]> http://www.dslreports.com/forum/remark,20467338 Sun, 11 May 2008 21:55:29 EDT