30 replies to this topic

[Scott]

Here's a snapshot from my SB5100...



My father and I recently replaced all the cable lines in the house with higher grade coax. Also we made out cable company come out and replace the line from the pole to the house, and we ran ethernet cable through the whole house to make everything wired (except my sister's notebook).

Anything about 54 on the upstream will kill your connection. Ask your ISP to replace your outside line, also I removed all splitters on my line for the internet connection, we have satellite tv so we don't need cable anywhere else.

My connection is 10mbit for internet (actual internet, not network speed). So I can usually download around 1.5 - 2.0mbps. It's pretty sweet.

Edited by Scott, 28 April 2006 - 02:09 PM.

[Devil McDunnough]

this is what I got.
I have Optimum Online Boost.
-3 seems a bit low considering you have a direct line to your modem but still a good signal. The magic number for downstream is between -15 and +15. The power levels go nuts around the summer time so a little downtime may be expected.

Edited by Serge666, 11 May 2006 - 12:31 AM.

[Scott]

Actually -3 is better than your +7... 0 is the optimum level. Whatever is closer to 0 is better. (So my ISP tells me)... correct me if I'm wrong.

[Devil McDunnough]

yea, +7 is kinda bad but the cable is split once before it hits the modem. So without the spliter the DS level would actualy be higher. I'm just saying that for an off-the-poll cable line the power level shouldn't even be in the negitives. I guess maybe this has something to do with you not having cable tv?

[Scott]

Yeah, I don't have cable tv, but everyone around here including my grand parents and some friends in town are all in the -'s. Our ISP has a limit each way of +13/-13. I remember when I had -14, the modem would barely stay connected. Removed all the splitters and replced lines, it's like going from 56k to fibre optic haha.

[Seantb]

Kagerusui, on Apr 27 2006, 18:21, said:

*I thought I added this reply before... oh wellz*

My ISP still dont know what the issue is and promised me to change my modem to a white modem.

And after the visit yesterday from the ISP my power level went up from 47 average to 51 >.>

thanks for replies.

a white modem is little info to us... make/model and the reason it most likely changes is because if it is not a docsis it will be on a different frequency and then the signal will be different.

And despite what some people have said about the Docsis modems... here is what your lvls should be

down stream +7 to -7 is where it should be but the modem will work ok from +11 to -11 anything worse then that and you will have issues, That goes for the docsis VOIP modems as well.

upstream is 36 to 53, although a little above 53 will still work, anything below 36 and there is a big problem, but you have to consider your signal to noise as well... on a docsis you want it between 30-40 anything lower and your ISP has to change something on thier end.

now some ISP's will let the numbers go higher and lower then what i have stated but these are all where your ISP should aim for for the best signal and leaste amount of packet loss.

Edited by Seantb, 20 May 2006 - 09:31 PM.

[Kagerusui]

Hi again :-p

Ok, the "White modem" was a modem they used on the past.
I dont really know the version nor model of the modem so I cant provide much help.

Anyway, after having techs coming like 6x at my house after i posted here they still havnt changed the modem (to white one).
They do keep changing it to the SBV5120 though, but no fix yet.

They totally gave up on my issue, wich is sad (for me).
But the only thing im hoping on now is that whenver Optimum Boost is available on my area this problem is solved as well.

Another note:
They said the modem is running on its latests drivers/softwares, and I didnt find any update on it myself on the web.

The software versions Im using is:

Software Version: SBV5120-2.9.1.1-SCM54-SHSF
Hardware Version: 1
MIB Version: II
GUI Version: 1.0
VxWorks Version: 5.4

[Seantb]

i dont know if u stated this before but who is your ISP?

[moofleta]

Hello there Kagerusui

I'm having exacly the same problem. next monday it's gonna be the 6th time for them to come. they replaced everything from modem to the cable that goes to the pole.

yesterday I had the Optimum Online Network guys sitting outside and monitoring the network here. they saw nothing. when later on the same evening, had the problems again, I called the support and they told me there's about 20% packet loss and that the transmit signal is low.
they will send someone again on monday, but until the technitian see the problem in realtime, he will not be able to fix it

it's been amonth now.

[Scott]

White modem = Surfboard 4100 (or around that model number). And it's not going to fix your problem.

[Seantb]

white modem may fix the problem.. if its the one im thinking off it operates on a different frequency, different routers with different firm ware... so unless the issue is with the cable only it will fix it... but if its with the ISP routers and software it will most liekly fix the issue. well if u can call that fixed.


if the white modem looks somewhat like this and a little bigger and white and only has 3 lights it is the one i am thinking of.

[Scott]

It won't fix it because it's not a modem issue. The sb5100 was replaced many times and that did not fix the issue, anyways the white modem that the company is talking about is most likely this modem:

[choche]

I have the same Problem with my Motorola SBV5120E
could anybody find a Solution for the IGMP: Error etc...?

I have big problems with my Internet and telephone, the speed is sometimes good and then too slow. Sometimes I can`t surf and get an error in the internet Page.


Could anybody help me?

I have done three cap from my Problems.

1) CAP from my Log (IMGP: Error Group Address 0.0.0.1 ist not a legal Multicast)



2) CAP from my SIGNAL:



3) Cap from my STATUS:
[img=http://img214.imageshack.us/img214/7607/statusmodemsbv5120emotoroladq3.th.jpg]



Thanks in advance

Edited by choche, 13 October 2006 - 10:31 AM.

[Seantb]

Scott, on Jun 27 2006, 11:27, said:

It won't fix it because it's not a modem issue. The sb5100 was replaced many times and that did not fix the issue, anyways the white modem that the company is talking about is most likely this modem:

i couldn't get a pic of the modem you pointed to but the reason i said the white one might fix it is because if the white modem does not use the DOCSIS network any problems affecting the DOCSIS network of our ISP will not affect a non DOCSIS modem

choche, on Oct 13 2006, 09:31, said:

I have the same Problem with my Motorola SBV5120E
could anybody find a Solution for the IGMP: Error etc...?

I have big problems with my Internet and telephone, the speed is sometimes good and then too slow. Sometimes I can`t surf and get an error in the internet Page.


Could anybody help me?

I have done three cap from my Problems.

1) CAP from my Log (IMGP: Error Group Address 0.0.0.1 ist not a legal Multicast)



2) CAP from my SIGNAL:



3) Cap from my STATUS:
[img=http://img214.imageshack.us/img214/7607/statusmodemsbv5120emotoroladq3.th.jpg]



Thanks in advance

Your signal looks fine, you seem to be getting some packet loss. It looks like you are using a VoIP/Internet DOCSIS modem, you may be getting issues because they are on the same modem, some ISP's use this VoIP modem for Phone only and then use a SB5100 for internet, this is costly for the ISP but the ideal way to go as then your internet and phone dont need to share the same channel and bandwidth.

The modem does not need the time to work but without the correct time your log files will be off, and can cause iissues, i suggest a modem swap and a call to your ISP

[Luna]

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!!!