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10.6: Avoid a DHCP issue with Dual Band Airport Extreme
Authored by: madh on Mar 21, '10 08:59:29AM

Yes, I have my airport set in the mode where it appears as one SSID but Apple devices can choose the 2.4 or 5 ghz band depending on which is decided to be better. Up until I started playing with OSX Server services all clients in my network regardless of actual band they were connected to worked fine. I started working with DNS and DHCP on the OSX server, turned off these services on my Netgear FVS338. DNS worked fine, you could ping anything on the network. The only issue was that the OSX DHCP Server would not issue IP's to any device on the opposite Band. The client would end up getting that default IP 169.?.?.?, can't remember the exact IP. It seems to be something specifically related to the way DHCP requests are made. It would be interesting to have another DHCP server to test thats its not just OSX DHCP. May have to pull one of my Windows Servers out of retirement.

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