Configuring Fast Roaming For Wireless Clients; Opportunistic Key Caching - Siemens SCALANCE W1750D UI Configuration Manual

11.2

Configuring Fast Roaming for Wireless Clients

11.2.1

Opportunistic Key Caching

SCALANCE W now supports opportunistic key caching (OKC)-based roaming. In OKC-
based roaming, the AP stores one pairwise master key (PMK) per client, which is derived
from the last 802.1X authentication completed by the client in the network. The cached PMK
is used when a client roams to a new AP. This allows faster roaming of clients between the
APs in a cluster, without requiring a complete 802.1X authentication.
Note
OKC roaming (when configured in the 802.1X Authentication profile) is supported on WPA-2
clients. If the wireless client (the 802.1X supplicant) does not support this feature, a complete
802.1X authentication is required whenever a client roams to a new AP
Configuring an AP for OKC Roaming
You can enable OKC roaming for WLAN SSID by using the SCALANCE W UI or the CLI.
In the SCALANCE W UI
1. Navigate to the WLAN wizard (Go to Network > New OR Go to Network > WLAN SSID
and click edit).
2. Click the Security tab.
SCALANCE W1750D UI
Configuration Manual, 02/2018, C79000-G8976-C451-02
11.2 Configuring Fast Roaming for Wireless Clients
Wireless Network Profiles
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