Asus RT-AC66R & Motorola SB6141 Combo - Amber light

[scarzy]

Looking for any guidance on this issue since I have literally spent hours and hours trying to identify the problem and surfing the web looking for answers. I own a Motorola SB6141 modem and have Comcast Blast internet (50MB down/10MB up). I have been using a RT-N66R router until recently. When the RT-N66R is connected to the Modem, I receive a blue blinking ethernet light. When I replace the router with the newly purchased RT-AC66R (Firmware:374.41_beta1 Merlin build), I receive an amber blinking ethernet light.

When I check the Tools section of the firmware, the WAN port is listed as 100 Full Duplex for the RT-AC66R. When I check the Tools section of the firmware, the WAN port is listed as 1000 Full Duplex for the RT-N66R.

Per the Modem manual, the ethernet light blinks means: Transmitting or receiving data on Ethernet port.

Amber: A device, PC, or hub is connected to the Ethernet (10Base-T) or Fast Ethernet (100Base-T) port.

Blue: High-speed Gigabit Ethernet (1000Base-T) connection from the SB6141 to your PC.

I am currently using a Cat 5E ethernet cable to connect the modem and router. I checked all the settings between the two routers and the settings are identical. Both are set up in "Wireless Router Mode". I tried a few different ethernet cables with no success. I finally broke down and ordered a Cat 6 ethernet cable from Monoprice hoping that might help. Any other ideas??? Are there any router settings that would affect this that I am missing? Thanks in advance for everyone's help!

 

[cmillar6]

there should be a reset button on the back of your modem, hold it in a reset the modem. Once it reboots plug in your ac66

 

[scarzy]

Thanks for the tip but no success. I even unplugged all the cables on the cable modem for 15 minutes and reset without success. Still getting the amber light on the SB6141 when plugged into the RT-AC66R. I wonder if the WAN port could be defective on the RT-AC66R? Will try the Cat 6 cable when it arrives this Wed and hope for the best. Any other ideas? Very strange!

 

[cofetym]

Try resetting the modem from the modems configuration page:192.168.100.1

 

[scarzy]

No luck unfortunately but I appreciate the help. It's strange because I have tried setting the RT-AC66R and the RT-N66R next to each other and trade off plugging the ethernet from the modem into each router in succession. Each time the SB6141 when plugged into the RT-N66R is blue (1000 Full Duplex) and when plugged into the RT-AC66R, the SB6141 is amber (100 Full Duplex). I did this 5 times within a two minute period and every time with the N, the modem was blue and with the AC, the modem was amber. So strange!!!

 

[cmillar6]

return the router, somethings not right

 

[cofetym]

What overall goal are you trying to achieve?

I have the same routers. The RT-N66u is connected to the modem and I'm piggy backing from the RT-N66u to the RT-AC66u so I've never experienced that or felt the need to run the RT-AC66u first.
I believe I even have the same modem,using firmware 374.40

 

[cofetym]

I take it you tried the stock firmware first.

 

[KGB7]

Go back to factory firmware, 41 beta is still beta.

 

[scarzy]

I first tried the ASUS stock firmware and received the amber light with the RT-AC66R. I have another RT-AC66R coming this week along with a couple CAT 6 cables so will try to switch them out and see what I discover. Odd indeed!!!

 

[scarzy]

It seems the ethernet cable was the issue. I replaced with a Cat 6 and got the blue light (1000 Full Duplex) from the modem immediately. Thanks for all the guidance everyone!