Performing Advanced Configuration Options for 802.1X

This section describes advanced configuration options for 802.1X authentication.

Configuring Reauthentication with Unicast Key Rotation

When enabled, unicast and multicast keys are updated after each reauthorization. It is a best practice to configure the time intervals for reauthentication, multicast key rotation, and unicast key rotation to be at least 15 minutes. Make sure these intervals are mutually prime, and the factor of the unicast key rotation interval and the multicast key rotation interval is less than the reauthentication interval.

NOTE: Unicast key rotation depends upon both the AP/controller and wireless client behavior. It is known that some wireless NICs

have issues with unicast key rotation.

The following is an example of the parameters you can configure for reauthentication with unicast and multicast key rotation:

Reauthentication: Enabled

Reauthentication Time Interval: 6011 Seconds

Multicast Key Rotation: Enabled

Multicast Key Rotation Time Interval: 1867 Seconds

Unicast Key Rotation: Enabled

Unicast Key Rotation Time Interval: 1021 Seconds

In the WebUI

1.Navigate to the Configuration > Security > Authentication > L2 Authentication page.

2.Select 802.1x Authentication Profile, then select the name of the profile you want to configure.

3.Select the Advanced tab. Enter the following values: n Reauthentication Interval: 6011

n Multicast Key Rotation Time Interval: 1867

n Unicast Key Rotation Time Interval: 1021

n Multicast Key Rotation: (select)

n Unicast Key Rotation: (select)

n Reauthentication: (select)

4.Click Apply.

In the CLI

(host)(config) #aaa authentication dot1x profile reauthentication

timer reauth-period 6011 unicast-keyrotation

timer ukey-rotation-period 1021 multicast-keyrotation

timer mkey-rotation-period 1867

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

802.1X Authentication 220

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Dell 6.2 manual Performing Advanced Configuration Options for, Configuring Reauthentication with Unicast Key Rotation

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