Here's our setup: we have a dual-band router, broadcasting two SSIDs (which are effectively the same network). The 2.4GHz band is using 802.11g only, and the 5GHz band is a mixed 802.11A and N.
My laptop is 'AGN' compatible and connected using 802.11N. The Xbox is connected to the same SSID using 802.11A. However, the problem lies with 2 of the other laptops. Both have 'ABG' network cards, and both can connect to the 802.11G 2.4GHz network without issues, but neither of these laptops will connect to the 5GHz network using 802.11A.
If I change the network settings so that the 5GHz band is A-only, the two laptops in question above connect fine. I can't see what's wrong - both cards are set to a/b/g mode, they all support WPA2...
Is there some sort of bug/feature that prevents connecting to a mixed A/N network?
Note: one laptop is Win 7 Pro, the other is Vista HP.