12 Replies Latest reply: May 10, 2012 7:30 PM by anthony131
JP996 Level 1 Level 1 (0 points)

I recently upgraded my Comcast service and was given their Xfinity Wireless Modem/Router. When I hook up their modem/router my airport extreme it is unable to connect. Are their any changes I need to make to the airport? The technician that was here said he had trouble before getting it to work, but others were able to get it to work without incident.


iMac 20", MBP 15", iLife 11', iWork
  • Bob Timmons Level 10 Level 10 (92,350 points)

    Check to make sure that the Ethernet cable connects from a LAN <-> port on the Comcast device to the WAN port (circle of dots icon) on the AirPort Extreme.

     

    Since you have 2 routers in series, the second....the AirPort Extreme....must be configured in Bridge Mode to function correctly on the network.

     

    Open AirPort Utility - Click Manual Setup

     

    Click the Internet icon

     

    Connect Using = Ethernet

     

    Connection Sharing = Off (Bridge Mode)

     

    Update to save any changes and then power down the entire network and restart devices one at a time.... Comcast first for a moment, then AirPort Extreme, then devices.

  • JP996 Level 1 Level 1 (0 points)

    Thank you very much! It works

  • JP996 Level 1 Level 1 (0 points)

    Well, I got the base stations to work, but the airport express isn't showing up. Any suggestions?

  • Bob Timmons Level 10 Level 10 (92,350 points)

    Hmmm. Don't think the Express was mentioned before.

     

    How was it configured previously? What do you want it to do?

  • JP996 Level 1 Level 1 (0 points)

    I didn't mention it before because the extreme wasn't working. I assumed once the extreme was working, the express would work, as it did prior to the new modem. I was using it as a wifi extender as well as wirelessly playing music from my iMac to my home stereo.

  • Bob Timmons Level 10 Level 10 (92,350 points)

    Temporarily, move the Express to the same room as the AirPort Extreme. Plug in a pair of headphones to simulate speakers, but do not power it up.

     

    Power down your entire network...all devices....order is not important

     

    Wait a moment, then start the Comcast gateway and let it run for 45-60 seconds by itself

    Power up the AirPort Extreme the same way

    Power up the AirPort Express the same way

    Power up other devices, computers the same way

     

    Check for proper network operation and please report on your results.

  • JP996 Level 1 Level 1 (0 points)

    Hi Bob, I was unable to get it to work by your instructions above. However, I was able to get it to work by following your instructions in another thread you commented on....

     

    https://discussions.apple.com/message/15175603#15175603

     

    Thanks!

  • kosmokid Level 1 Level 1 (0 points)

    Hi, I also have an Xfinity Wireless Modem-Router Combo. I also have an Airport Extreme, and I need to extend my wireless range. Am I able to use the Airport Utility to set up the Xfinity modem as the main wirless router, and then use the Airport to extend my network?

  • Bob Timmons Level 10 Level 10 (92,350 points)

    Am I able to use the Airport Utility to set up the Xfinity modem as the main wirless router, and then use the Airport to extend my network?

    Yes, if you plan to connect the AirPort Extreme to the Xfinity router using a wired Ethernet connection.

     

    But to clarify, you will not use AirPort Utility to configure the Xfinity device. AirPort Utility would be used to configure the AirPort Extreme.

     

    No, if you are hoping to configure the AirPort Extreme to connect to the Xfinity router and extend the network using wireless only.

  • kosmokid Level 1 Level 1 (0 points)

    Thanks for your prompt response, Bob.

     

    So I'm to understand my options are either:

     

    A.) Connect the Extreme to the XFINITY router via wire, and then turn off the XFINITY router wireless, only using the Airport

     

    B.) Use just the XFINITY router, and use my Airport as a doorstop

     

    C.) Buy an Airport Express, and do the same as option A, extending the network via the Extreme and Express.

     

    I've been having connectivity issues: could it be that the XFINITY router is utilizing it's bandwith for both it's own native wireless AND the wireless space the Airport is requesting?

  • Bob Timmons Level 10 Level 10 (92,350 points)

    A.) Connect the Extreme to the XFINITY router via wire, and then turn off the XFINITY router wireless, only using the Airport

    Since you specified that you wanted to use the AirPort Extreme to extend your network, I understood this to mean that you would use the XFINITY router to provide a wireless signal at its current location and then place the AirPort Extreme in another room to provide wireless coverage in that area.

     

    You would connect the AirPort Extreme to the XFINITY router using a wired Ethernet connection and configure it to produce a wireless network using the same wireless network name, security, and password as your XFINITY network so computers could roam from area to area and always stay on the same network.

     

    AirPort Utility, the setup application for the AirPort Extreme will suggest that you configure the Extreme in Bridge Mode, which would be the correct setting.

     

    If you turned off the wireless on the XFINITY router, then the AirPort Extreme would not be extending anything. It would be your only wireless access point.

     

    B.) Use just the XFINITY router, and use my Airport as a doorstop

    That is an option if you do not want to establish an Ethernet connection between the XFINITY router and AirPort Extreme.

     

    C.) Buy an Airport Express, and do the same as option A, extending the network via the Extreme and Express.

    That is an option, but I was trying to provide you with a solution without having to purchase more routers.

     

    If you decide on this option, you would turn off the wireless on the XFINITY router (if the AirPort Extreme is close by) since it is never a good idea to have two wireless routers in close proximity due to the likely interference effects between them..

  • anthony131 Level 1 Level 1 (0 points)

    Bob, since you seem to be able to solve all problems Airport/Xfinity related, I was hoping beyond hope that you could take a crack at this one:

     

    • We have Xfinity

    • We are using a Cisco Linksys DPC3008, not the standard Comcast Arris router

    • There is a Netgear switch connected to the Linksys

    • Our iMac is connected via Ethernet to the Netgear switch and works perfectly

    • The Airport Express is connected to the Netgear switch via Ethernet

    • The Airport light shows green

    • It is in Bridge mode

    • I have set up the TCP/IP via my MacBook Air, using Airport Utility, to match the settings in our iMac, which is connected via Ethernet, leaving the IP address blank during Manual Setup and then moving the setting to connect Using DHCP

    • I have powered the whole system and individual components up and down over and over.

     

    It still does not work...help.

     

    Tony