Motorola Series Switch WS5100 - Manual (Page 119)

Network Setup 4-45
8. Optionally select one of the following from within the Fast Roaming (8021x only) field.
9. Refer to the Status field for the current state of the requests made from applet. This field displays error
messages if something goes wrong in the transaction between the applet and the switch.
10.Click OK to use the changes to the running configuration and close the dialog.
11.Click Cancel to close the dialog without committing updates to the running configuration.
4.5.2 Viewing WLAN Statistics
The Statistics screen displays read-only statistics for each WLAN. Use this information to assess if
configuration changes are required to improve network performance. If a more detailed set of WLAN
statistics is required, select a WLAN from the table and click the
Details button.
To view WLAN configuration details:
1. Select Network > Wireless LANs from the main menu tree.
PMK Caching Select Pairwise Master Key (PMK) caching to create a shared key between a client device
and its authenticator. When a client roams between devices, the clients credentials no
longer must be completely reauthenticated (a process that can take up to 100 milliseconds).
In the instance of a voice session, the connection would likely be terminated if not using a
PMK. PMK cache entries are stored for a finite amount of time, as configured on the wireless
client.
Opportunistic Key
Caching Opportunistic Key Caching allows the switch to use a PMK derived with a client on one
access port with the same client when it roams over to another access port. Upon roaming
the client does not have to do 802.1x authentication and can start sending/receiving data
sooner.
Pre-Authentication Selecting the Pre-Authentication option enables an associated MU to carry out an 802.1x
authentication with another switch (or device) before it roams to it. The switch caches the
keying information of the client until it roams to the other switch. This enables the roaming
client to send and receive data sooner by not having to conduct an802.1x authentication after
roaming. This is only supported when 802.1x EAP authentication is enabled.