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Dabug
Posts: 4
Registered: ‎07-24-2010

Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

I can't connect my router (WRT54GL) to my new cable modem (Motorola Surfboard SB6120).

 

Some info:

1)  Cable modem works perfectly when connected directly to computer ethernet port

2)  ISP is Optimum Online

3)  Using Automatic DHCP setting on router

4)  Using MAC cloning on router

5)  I can access the router's admin screen from the PC

6)  I can connect to the router wirelessly, but no internet access

7)  I've tried powering down everything multiple times, still no internet access

8)  I upgraded the router firmware to 4.30.14

9)  The "link" light on the cable modem never lights up when connected to the router

10)  This is very frustrating

 

Thanks

dudztgp
Posts: 1,496
Registered: ‎06-27-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

[ Edited ]

Try this procedure. Make sure that the ethernet cable coming from the modem is connected to the WAN port of the router.

Dabug
Posts: 4
Registered: ‎07-24-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

Thanks.  I should have noted that I've been through that procedure.  I still get 0.0.0.0 IP address on the status page.

dudztgp
Posts: 1,496
Registered: ‎06-27-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

You mentioned that the link light won't turn on? Did you try another ethernet cable? How about the light on the router, does it lit up? How about when you connect your computer to the modem, does the link lit up?
Dabug
Posts: 4
Registered: ‎07-24-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

Hi

 

I've tried two ethernet cables, no luck.  On the router, I get lights for Power, WLAN and the ethernet port that the pc is connected to.  The "internet" light is not lit.

 

When the modem is connected directly to pc the link is lit up, just not when it's connected to router.

dudztgp
Posts: 1,496
Registered: ‎06-27-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

 


Dabug wrote:

Hi

 

I've tried two ethernet cables, no luck.  On the router, I get lights for Power, WLAN and the ethernet port that the pc is connected to.  The "internet" light is not lit.

 

When the modem is connected directly to pc the link is lit up, just not when it's connected to router.


 

The internet light won't turn on as you need to plug something on the WAN port. And that should be the cable coming from the modem.

 

When you connected your pc directly to the modem, do you get internet access?

Dabug
Posts: 4
Registered: ‎07-24-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

Cable modem -> pc -- perfect internet access

Cable modem -> router WAN -> pc -- nothing

dudztgp
Posts: 1,496
Registered: ‎06-27-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

[ Edited ]

Have you tried to plug the ethernet cable from the modem to one of the LAN ports of the router? This is just to isolate the ports. Check if everything lights up.

LouNawlins
Posts: 9
Registered: ‎07-26-2010

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

You may also need to do a power reset on both the cable modem and the router.

jvaguiar
Posts: 1
Registered: ‎01-31-2011

Re: Can't connect WRT54GL router to Motorola Surfboard cable modem SB6120

Have you addresses this issue? I have the same problem. Could you help me? I spend hours with Comcanst tec suport.