Currently Being ModeratedJul 22, 2013 8:52 PM (in response to Mav3333)
I work with Comcast and enable the new modem to connect directly to my Mac.
So, now the modem has associated with your Mac.....and it will remember that connection and device....and look for it at all times.
After I'm off the phone, I connect the new modem to the Airport Extreme and a connection to the intermet couldn't be made.
The modem is still looking for your Mac because it associated with the Mac, and when it does not see it connected, it refuses to issue a valid IP address to the AirPort Extreme.
I connected the modem back directly to the Mac and it worked perfectly.
Clearly, the modem is still remembering your Mac. it will not look at another device.
So, the trick is to make your modem "forget" the Mac.....so that it can become acquainted with the AirPort Extreme.
Push the reset button on the modem....if present....and then power it off by pulling the power cable from the back of the modem or from the wall socket.
Leave the modem off for at least 30 minutes.
Now you will need to perform a Factory Default Reset on the AirPort Exteme. Proceed as follows:
Pull the power cord from the back of the AirPort Extreme
Wait a few minutes
Hold in the reset button first, and continue to hold it in for 9-10 seconds while you simultaneously plug the power back into the back of the AirPort Extreme.
Release the reset button after the hold period and allow a full minute for the Airport Extreme to restart
Power off the AirPort Extreme again
After the wait period for the modem, connect the Ethernet cable from the modem to the WAN "O" port on the AirPort Exteme
Power up the modem and let it run for 5 minutes by itself
Power up the AirPort Extreme and let it run for a few minutes, and then set it up again. You can use the same device name, wireless network name, passwords, etc that you used before if you wish.
Post back on your results
If the AirPort Extreme still won't work with the modem, then you will need to reset the modem again before you attempt to connect it to your Mac.
Currently Being ModeratedJul 23, 2013 4:27 AM (in response to Bob Timmons)
Many thanks for the help, but no luck. I followed your steps through, but still comes up with "ethernet unplugged." Tried the procedure a second time and no change.
Currently Being ModeratedJul 23, 2013 6:12 AM (in response to Mav3333)
Looks like the AirPort is just not going to talk to the Motorola modem, or vice versa. Very strange. Could be a compatibility issue.
As a last ditch effort, call Comcast and ask them if they need the MAC Address of the AirPort Extreme to allow it to connect to their service. The MAC Address is also known as the Ethernet ID, which should be on the bottom of the AirPort.
If that's not it, then you will have to try another make and model of modem, or another router.
Currently Being ModeratedJul 24, 2013 12:06 PM (in response to Bob Timmons)
Tried that but no dice. I broke down and purchased the new Airport Extreme. Worked withou any problem at all...must be some sort of bug with the old Airport. Hated to spend the money, but the new Airport seems pretty slick.
Currently Being ModeratedAug 24, 2013 4:42 PM (in response to Mav3333)
I had the same problem. Time Warner Cable was of zero help. The SB6141 does not work with the Airport Extreme and at the moment the CMD31T by Netgear will not connect to their network (do not even bother calling technical support if it does not work). Here is my adventure with insanity.
Currently Being ModeratedOct 31, 2013 2:36 PM (in response to Jay Yoo)
It was a breath of fresh air to hear that you resolved your issues with Time Warner. I've been experiencing the same issues with the SB6141 and have been pulling my hair out for days. Can you please tell me which model of the Ubee modem is working for you on Time Warner? They don't list the Ubee in their modem compatibility list.
Currently Being ModeratedOct 31, 2013 4:10 PM (in response to globalchris)
It is a Ubee DDW3611. Works like a charm.
Currently Being ModeratedNov 21, 2013 11:31 PM (in response to Jay Yoo)
I'm also having a hard time getting the NEW Apple Airport Extreme to link up with my SB6141, via Time Warner Cable.
Were you able to just walk into Time Warner and ask them for a replacement? Or did you have to go through a walk around? I just want to know so I can not waste time having them give me a non compatible modem.
Currently Being ModeratedNov 28, 2013 5:01 AM (in response to Mav3333)
Having the same problem but with the NEW Airport Extreme and my SB6141. Inexplicably, the AE stopped connecting to the internet working after flawlessly working over the entire summer to present. The AE was broadcasting just fine and I could connect to it via wifi without issue. Unfortunately the AE wouldn't connect to the Internet! I could connect my Macbook directly to the cable modem and it worked just fine.
I used the Airport Utility and verified the no-connectivity between the AE and the internet.
I've tried all of the above proposed solutions in this and other threads (resetting the modem, resetting the AE, making sure that they are off for awhile), and am ripping my hair out as they haven't worked for me. It's Thanksgiving, so I can't just run out to any store and purchase a cheapo wifi to shut me up for awhile (or even a new AE).
In the interim, we've been tethering our iPhones and using that.
BTW, I have Comcast, and have never had problems with them. Knock on wood.
I'm thinking about buying either a new AE (sell the initial one) or a new modem (again, sell the initial one).
Any recommendations are welcome, but I feel like I've exhausted the possibilities. I've seen people mention that AE only supports up to IPV4 where as the SB6141 supports IPV6. Wondering if there is just a "talking" conflict between the devices because of that. I just feel like I shouldn't have to do detailed configs for the AE when it worked for awhile and straight out of the box.
Currently Being ModeratedMar 3, 2014 11:42 AM (in response to Bob Timmons)
Thanks for laying this out. I forgot that the modem won't switch over easily to a new device. I was able to get eveything humming nicely together.
Currently Being ModeratedMar 10, 2014 8:31 PM (in response to Mav3333)
What keeps happening to my Mac Mini seems related to this, but different. I have Time Warner, a Motorola SB5101U modem, an Airport Extreme which was the newest version in March 2013. Both my iPad and iPhone get email and internet access through this set up just fine.
The Mac Mini, on the other hand, since the 10.9.2 upgrade last fall has had a variety of problems with accessing the internet after a period of "sleep". Most often the Connection Doctor will report it has internet access, yet all email accounts will show red LEDs. And Safari will not load. Sometimes the problems will be corrected after 10 or 15 minutes. Sometimes re-entering passwords will fix it, but not always. And that, of course, gets tiresome.
If I get impatient and switch to my Verizon JetPack I will have instant access to the internet and email.
Since the two devices have good connectivity with the modem/airport set up I do believe the source must be in the computer's connectivity. I've had multiple conversations with Apple Support over the past 4 months. They try hard and seem to want to help, but have thus far had no solution which explains or fixes the problem. They did suggest totally erasing the OS and re-installing it, which seems a sledgehammer approach.
I don't spend much time here on these discussion groups, so if there's some other location I should take this problem in searching for answers, please tell me!