Hi,
I have this Motorola SBV5121E cable modem and every X seconds and/or minutes it writes the following content into its error log:
QUOTE
IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast


The details of the modem:
QUOTE
Model Name: SBV5121E
Firmware Version: 2.17.1.2
Revision: 10
Vendor Name: Motorola
MTA Firmware name: SBV5121E-2.17.1.2-SCM10-SHNP
Boot Version: 8.5
Hardware Version: 1
BCMA Software Version: 49.46
MIB Version: II
GUI Version: 1.0
VxWorks Version: 5.4
Serial Number: 158155701948354801012004
Firmware Build Time: Jul 27 2006 18:37:16


The situation:

Internet <-> MyProvider <-> CableModem <-> Some router <-> my pc


I wouldn't care about those errors when everything is fine, but that's not the case and I am not sure if it's the modem or just my provider.
During one day I get about 10 new IP's but the reason is difficult to determine (at least for me) because when I "reset" the modem it get's a new IP, too, of course.
So if this modem "dies" of any reason, it get's a new IP and I am not able to see if it's the modem's fault or the provider's.

My signal is good said the cableguy: http://avarus.com.ar/cablemodem-signal.png
Is that true?

I have absolutely no clue about this cable-stuff as I always used ADSL before which worked fine and I really appreciate any help/hint for my problem.

Thanks and have a nice day.
avarus.