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Q: AirPort Extreme (ac) not working with Netgear cable modem (CMD31T)

My Netgear cable modem (CMD31T) and Apple Airport Extreme (ac one) aren't playing nice together.

 

I can connect my laptop (MacBook Air) directly to the RJ-45 of the cable modem to get an Internet connection. From the laptop, System Preferences > Network reports the following:

 

Configure IPv4: Using DHCP

IP Address: 50.88.235.xx

Subnet Mask: 255.255.248.x

Router: 50.88.232.x

DNS Server: 65.32.5.111, 65.32.5.112

(Note: x's inserted above for the respective digits I chose to hide.)

 

Then, after connecting the cable modem to the AirPort, connecting wirelessly to the AirPort Extreme from my laptop does not lead to Internet connectivity. The AirPort Utility reports the following:

 

IP address: 169.254.96.51

LAN IP address: 10.0.1.1

 

With the following warning status:

Internet Connection

No DNS Servers

 

The AirPort's LED blinks amber.

 

The Router Mode is configured as "DHCP and NAT".

 

Things I've tried:

Reset and restart AirPort Extreme

Reset and restart cable modem

Bridge mode (with resets and restarts)

 

Thanks!

iMac, OS X Mountain Lion (10.8.4)

Posted on Mar 27, 2014 4:01 PM

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Q: AirPort Extreme (ac) not working with Netgear cable modem (CMD31T)

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