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Old 09-06-2008, 11:15 AM   #1
mnh811
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How To Conncet Cable Modem To Router?


Hello every body

I have RCN cable modem (DPC2100R2) and 2WIRE router. But i am not sure how to conncet them to each other.

I connected the ethernet cable between the two, but the laptop was not connected to the internet (it gave me a page with a heading: DSL FAILED TO CONNECT).

When I conncect the ethernet cable to my laptop directily the internet is perfect!

I'd really appreciate any response...
 
Old 09-06-2008, 11:29 AM   #2
stress_junkie
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First AFAIK you either have a cable model or you have a DSL modem. Your post refers to your modem in both ways. Do you have high speed cable Internet, probably from your cable tv provider, or do you have DSL medium speed Internet access, probably from your telephone company. There is a difference. The DSL modem has to be configured with your account name and password in order to work. This is usually done by the person that installed the DSL modem.

Once you know what kind of modem you have then let us know.

Last edited by stress_junkie; 09-06-2008 at 11:30 AM.
 
Old 09-06-2008, 11:38 AM   #3
paulsm4
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You didn't specify the model # for your "2 Wire router" (I have a 2 Wire, too - but it's my DSL modem, and it only has one port).

You need to have/do the following:

1) Have a broadband connection (e.g. your DPC2100R2 cable modem)
2) Have a multi-port hub or router (I don't know if your 2 Wire meets this criterion)
3) Plug your multi-port hub or router into the broadband connection
4) Plug your client PC into the multi-port hub

You've been talking about a cabled Ethernet connection. Odds are good your laptop also has WiFi (a wireless 802.11 connection). If you had (or bought) a WiFi router, then you could do this:

3) plug your WiFi router into your broadband connection
4) Use wireless on your laptop
 
Old 09-06-2008, 01:37 PM   #4
mnh811
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Thank you guys...
my modem is high spped cable internet and i got it from RCN.

The router is old and it is from AT T (2WIRE @GATE, with four ports of ethernet and one port for telephone).

The router also contains a DSL modem but i no longer use the at t and have just switched to RCN.

The only way my new internet work is by pluging the ethernet between the rcn modem and my laptop dsl port but i don't know how to connect between the rcn modem and the at t multiport hub so i can use the wireless in my laptop.
 
Old 09-06-2008, 01:50 PM   #5
stress_junkie
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You may have to log on to the router/hub to configure it. It may be looking for the network on the DSL line. Do you have the user manual for the router/hub?
 
Old 09-06-2008, 01:57 PM   #6
mnh811
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yes i have it, and actually my laptop get access to this wireless with excellecnt signal but without access to the internet!
 
Old 09-06-2008, 05:30 PM   #7
stress_junkie
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Quote:
Originally Posted by mnh811 View Post
yes i have it, and actually my laptop get access to this wireless with excellecnt signal but without access to the internet!
So log on to the router and check the settings. Usually you will have to use a cable connection to a router in order to configure it. Since you can connect to the Internet when you connect your computer to the cable modem then this isn't really a Linux problem; it is a router configuration problem. Your user manual should have all the information that you need.

Last edited by stress_junkie; 09-06-2008 at 05:34 PM.
 
Old 09-07-2008, 09:19 PM   #8
paulsm4
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Hi, mnh811 -

By coincidence, my Gateway 2-Wire died shortly after I posted my response to your question the other day. So I went out and bought a new DSL modem to replace it.

It sounds like my new DSL modem resembles your old 2-Wire:
1. Phone-in (for DSL)
2. 4 ports (for "everything else")

As an added bonus, my new DSL modem also has Wifi. So now I can do everything (broadband connection, firewall/NAT/router/hub) from one place (and retire my Linksys Wifi router/4-port hub).

But I'm not trying to bore you with my story. The points are:

1) A DSL modem is a DSL modem: you can probably use your old 2-Wire just as easily as your new RCN DSL modem

2) You need something with multiple ports. It sounds like your old 2-Wire fits the bill; it sounds like your RCN doesn't.

I'm still missing a lot of details, but (at least for starters) I'd suggest the following:

a) Unplug the RCN (at least for now)
b) Plug your 2-Wire back in to your DSL phone jack
c) Plug both of your PCs into two of your 4 ports on the 2-Wire

Sound like a plan?

TIA .. PSM
 
Old 09-08-2008, 01:31 AM   #9
mnh811
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Thank you Paulsm4 and stress junkle,
the 2 wire router catalog doesn't include information about changing the configuration. it is just small and explain how to set up the router connections.
i only have one pc. and the modem has usp port (but it is not the regular usp port, it looks like the usp port used for cameras). i don' know if this is the port which should be used to connect between the router and the modem...but i don't think so b/c the router does not have usp port.
 
Old 09-08-2008, 07:20 AM   #10
michaelk
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You might be able to use the router as an access point if you disable its DHCP server. There might be an option to disable the DSL modem too. I've never played with a single modem/router unit so I do not what options are available. Plug the cable modem into one of the RJ45 connectors. Typically the standard home cable ISP only provides one dynamic IP address which will not be a problem since you only have one computer.
 
Old 09-08-2008, 10:11 AM   #11
bgeddy
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As previously stated you should be able to do this - in fact I have done this with similar but not identical equipment.

You need to acces the configuration page (usually a html interface) on the 2 wire and turn off the broadband/dsl functionality. You also need to disable the dhcp server on the device. Connect the 2 wire to your laptop via cable and open your browser. You should get the "DSL FAILED TO CONNECT" page up. If there are any options to enter a setup or configuration here then do this - if not try typing "http://192.168.1.1" or "http://192.168.1.254" into the address bar. This number (IP address) may be in the manual as a way of accessing the 2 wire setup.

Then find the dhcp settings and disable it then the DSL/Broadband connection setting and disable that.

While you're at it try and switch off any wireless encryption just for now.

Then connect one of the 2 wire rj45 ports to your RCN cable modem. Restart you laptop and it should get an IP and gateway address from the RCN - effectively just using the 2 wire as a hub/switch.

You should then try the latter process wirelessly - i.e. disconnect you laptop and try and connect wireleslly with the 2 wire. As stated It may be easier at first to try this without any encryption. If this works then go back to the http://192.168.1.watever page and set up your WEP/WPA encryption. You'll have to mirror these settings on the laptop.

The key thing is getting into the 2 Wire configuration and being able to disable the dhcp and dsl/broadband functionality.

I know these things have been mentioned in previous posts but I thought I'd try and give a step by step guide.

Good Luck !
 
Old 09-11-2008, 06:15 PM   #12
mnh811
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hello guys i was trying to disable the dsl and the dhcp as u told me for the past two days....i found the broadband link advanced setting but there is no option to disable them?? there are these options: DSL Line Selection, ATM Circuit Identifier: VPI: VCI:

ATM Encapsulation: Bridged LLC Bridged VC-Mux Routed LLC Routed VC-Mux
ATM PVC Search
Broadband Connection

Connection Type
Broadband IP
Broadband DNS
Hardware Address Override
Upstream MTU

I tried to change the brodaband ip and dns from automatically and manually but these didn't work
 
Old 09-11-2008, 06:49 PM   #13
paulsm4
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mnh811 -

I think might be getting a bit off-track here:

Q: You are relying on your RCN DSL cable modem (DPC2100R2) to access the Internet. Is this correct?

Q: Does this work:
Quote:
a) Connect your phone to your DPC2100R2 (an RJ11 plug)

b) Power the DPC2100R2 on.
You should see the lights indicating both power and signal.

c) Connect an Ethernet cable (with RJ45 plugs) from your DPC2100R2 to your PC

d) Your PC should connect to the Internet.
Is this correct?
Please refer to this manual for the DPC2100R2 for the above:
http://www.scientificatlanta.com/Pro...es/4005527.pdf

Q: Does all of the above work (so far)?

Q: What *doesn*t work? If you can do the above, exactly what would you like to do next?

Q: What is the model# of your 2-Wire router?

Thank you in advance .. PSM

PS:
With regard to your last post - it sounds like you're in the wrong submenu. Just exit the menu without changing anything.

Last edited by paulsm4; 09-11-2008 at 06:53 PM.
 
Old 09-12-2008, 03:07 AM   #14
mnh811
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i am relying on my RCN cable. connecting the ethernet between teh rcn modem and my laptop is successful. i want to use my RCN dsl as wireless by using my old 2 wire at t router, but there are no clear way to connect between the RCN modem and the 2wire router
 
Old 09-12-2008, 04:11 AM   #15
bgeddy
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mnh811: I have found out some information which may be relevant to your 2 wire.

Go into the setup of the 2 wire as you did before - see if you have a "Broadband Link->advanced settings" and click "disable" next to - "ATM PVC Search "and choose "line one" under - "DSL Line Selection". I found this on another site and it may not apply to your hardware.

This may be relevant for your model but you still haven't given any model number for it.

Have you managed to turn off DHCP on the 2wire ?

Can you access the 2wire with the 192.168.1.254 as suggested ?

Once again the goals are to turn off DHCP on the 2 wire and to disable it's Broadband connection - just using it as a wireless access point. However getting the wired connectivity is the first step.
 
  


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