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Software User Manual
D-Link Unified Access System
12/10/09
Document
34CSFP6XXUWS-SWUM100-D7
Basic Setup
Page 435
Bcast Key Refresh Rate
Enter a value to set the interval at which the broadcast (group) key is refreshed for clients
associated to this VAP.
The valid range is 0-86400 seconds. A value of 0 indicates that the broadcast key is not
refreshed.
Additional Fields for WPA/WPA2 Enterprise
Pre-Authentication
If you select WPA/WPA2 Enterprise, you can enable Pre-Authentication.
Click the
Pre-Authentication
check box if you want
WPA2
wireless clients to send pre-
authentication packets. The pre-authentication information is relayed from the access point
the client is currently using to the target access point.
Enabling this feature can help speed up authentication for roaming clients who connect to
multiple access points. Only clients that connect by using WPA2 can use this feature. It is
not supported by the original
WPA
.
Pre-Authentication Limit
Enter the number of pre-authentications that can be in progress simultaneously on an AP.
The limit prevents too much load on the RADIUS server. This does not prevent the pre-
authentication from being attempted again when the load is lighter. A value of 0 represents
no limit.
Key Caching Hold Time
Enter the amount of minutes a PMK will be held by the AP. This applies to Pairwise Master
Keys (PMKs) generated by RADIUS, those that come from pre-authentication, and those
that are forwarded to the AP. Note that this time limit can be overridden by RADIUS if the
RADIUS server returns a longer time in the Session-Timeout attribute for a particular user.
The valid values of this are from 1–1440 minutes. If you do not enter a value, APs will not
forward the PMK for the wireless client to other APs in case the client roams to another AP.
Session Key Refresh
Rate
Enter a value to set the interval at which the AP will refresh session (unicast) keys for each
client associated to the VAP.
The valid range is 0-86400 seconds. A value of 0 indicates that the broadcast key is not
refreshed.
Table 265: WPA Security
Field
Description