WPA3-Personal Transition Mode Has Some Incompatibilities
When you are considering offering suggestions to family and friends on how to improve their wireless networks at home you might want to consider what old devices they use. Wi-Fi 7 requires WPA3 security on the 6 GHz band and not everything can support the new standard, but are instead stuck on WPA2. If WPA1 is only available on a device; that’s no longer a device, it’s garbage and should be treated as such ASAP.
WPA3 does offer a Personal Transition Mode which offers WPA2 and WPA3 authentication on the same network, however some older devices have a security feature which could lead you to having a bad time. These devices will refuse to connect to a network offering security options it doesn’t recognize, which is good for blocking compromised networks but not so great when connecting to a network offering a new official secure WPA3 connection.
If you know of some acquaintances who use old hardware, instead of suggesting a new WiFi 7 router perhaps instead suggest they don’t keep their router in a closet on the opposite side of the house from where they most frequently want to use those devices.
A consumer may therefore upgrade to a Wi-Fi 7 router or access point only to find that some older devices can no longer connect, "causing confusion and increased customer service calls for operators," CableLabs notes.
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Okay, I’m confused. If WPA3 was manditory for the new 6GHz band, how will some old pre-WPA3 device ever be able to talk to it? Or is this for one of those messed up “All radios act like the same BSS” nightmares?
Dude, second paragraph. You hope Personal Transition Mode works.
For many newer consumer level 802.11be APs and WiFi routers, they have been adding IOT networks, and some of them will have options to allow the IOT network to access the rest of the network. Those will essentially act as compatibility focused virtual APs where you can set it to use WPA2, as well as have it not use or show options in the beacon frames such as MLO, as well as some roaming assists such at 802.11r which causes issues for some older devices as well as many IOT devices.
If a user has known compatibility issues, they may need to look into which features a new AP may offer that will help them to maintain compatibility with older devices while allowing newer ones to take full advantage of 802.11be.