Advantages of 802.11r roaming over PMK and OKC:-
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- Pre-auth with multiple target APs before roaming
- Reserves WMM resources
- Supports OPEN, WPA2-PSK and WPA2-Enterprise
- No EAPoL key exchange while roaming
802.11r Fast Transition methods:-
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- OTA - Over-the-Air [Client to new AP]
- 4 packets are changed over the Wi-Fi channel
- ODS - Over-the-Distributed System [Through the old AP]
- 2 packets are exchanged over the Wi-Fi channel and 2 via Ethernet
Note:- This feature is supported only from Instant 4.0 and currently we do not support reserving WMM resources & ODS transition method on IAP or on aruba controller.
We need to also make sure client supports 802.11r to take full advantage of this feature.
Configuration from Webui:-
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Configuration from CLI:-
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Command output:-
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show ap pmkcache
show ap debug auth-trace-buf
show ap debug mgmt-frames
IAP advertised its 11r capability in beacon and probe response by sending Mobility Domain IE.
Sample packet-capture
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Thank you.