D-Link DWS-4026 Product Manual - Page 435
Additional Fields for WPA/WPA2 Enterprise, Table 265, WPA Security, Field, Description
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Software User Manual 12/10/09 D-Link Unified Access System Table 265: WPA Security Field Bcast Key Refresh Rate Pre-Authentication Pre-Authentication Limit Key Caching Hold Time Session Key Refresh Rate Description 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 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 preauthentication 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. 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 preauthentication from being attempted again when the load is lighter. A value of 0 represents no limit. 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. 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. Document 34CSFP6XXUWS-SWUM100-D7 Basic Setup Page 435