Parameter

Description

Dynamic WEP Key Size

The default dynamic WEP key size is 128 bits, If desired, you can change this parameter to

 

either 40 bits.

 

 

Interval between

Interval, in milliseconds, between each WPA key exchanges. The allowed range of values is

WPA/WPA2 Key Messages

1000-5000 ms, and the default value is 3000 ms.

 

 

Delay between EAP-

Interval, in milliseconds, between EAP-Success and unicast key exchanges. The allowed

Success and WPA2 Unicast

range of values is 0-2000 ms, and the default value is 0 ms (no delay).

Key Exchange

 

 

 

Delay between WPA/WPA2

Interval, in milliseconds, between unicast and multicast key exchange. Time interval in

Unicast Key and Group Key

milliseconds. Range: 0-2000. Default: 0 (no delay)

Exchange

 

 

 

Time interval after which

The time interval after which the PMKSA (Pairwise Master Key Security Association) cache is

the PMKSA will be deleted

deleted. Time interval in Hours. Range: 1-2000. Default: 8.

 

 

WPA/WPA2 Key Message

Number of times WPA/WPA2 key messages are retried. The allowed range of values for this

Retry Count

parameter is 1-5 retries, and the default value is 3 retries.

 

 

Multicast Key Rotation

Select this checkbox to enable multicast key rotation. This feature is disabled by default.

 

 

Unicast Key Rotation

Select this checkbox to enable unicast key rotation. This feature is disabled by default.

 

 

Opportunistic Key Caching

By default, the 802.1X authentication profile enables a cached pairwise master key (PMK)

 

derived via a client and an associated AP and used when the client roams to a new AP. This

 

allows clients faster roaming without a full 802.1x authentication. Uncheck this option to

 

disable this feature.

 

NOTE: Make sure that the wireless client (the 802.1X supplicant) supports this feature. If the

 

client does not support this feature, the client will attempt to renegotiate the key whenever it

 

roams to a new AP. As a result, the key cached on the controller can be out of sync with the

 

key used by the client.

 

 

Validate PMKID

This parameter instructs the controller to check the pairwise master key (PMK) ID sent by the

 

client. When this option is enabled, the client must send a PMKID in the associate or

 

reassociate frame to indicate that it supports OKC or PMK caching; otherwise, full 802.1x

 

authentication takes place.

 

NOTE: This feature is optional, since most clients that support OKC and PMK caching do not

 

send the PMKID in their association request.

 

 

Use Session Key

Select the Use Session Key option to use the RADIUS session key as the unicast WEP key.

 

This option is disabled by default.

 

 

Use Static Key

Select the Use Static Key option to use a static key as the unicast/multicast WEP key. This

 

option is disabled by default.

 

 

xSec MTU

Set the maximum transmission unit (MTU) for frames using the xSec protocol. The range of

 

allowed values is 1024-1500 bytes, and 1300 bytes

 

 

Token Caching

If you select EAP-GTC as the inner EAP method, you can select the Token Caching checkbox

 

to enable the controller to cache the username and password of each authenticated user. The

 

controller continues to reauthenticate users with the remote authentication server, however,

 

if the authentication server is not available, the controller will inspect its cached credentials

 

to reauthenticate users.

 

This option is disabled by default.

Token Caching Period

If you select EAP-GTC as the inner EAP method, you can specify the timeout period, in hours,

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

802.1X Authentication 198

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Dell 6.2 Dynamic WEP Key Size, Either 40 bits, Interval between, Key Exchange Delay between WPA/WPA2, Unicast Key Rotation

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