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In case data encryption is used, the maximum number of SUs that can be served by an AU is

limited to 124 (512 when data encryption is not used). Note than when data encryption is

needed, it must be used by all SUs served by the same AU, as well as by the AU itself. Please

change the number of supported SU to 124 in order to enable the encryption mode.

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Upon downgrade from version 4.5 to version 3.0 or lower, all the information in the new

Network Management IP Address Ranges table will be lost. Hence, management access may

be lost if the unit was managed from an IP address that is on a subnet defined in the new

tables.

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When upgrading from version 3.0 or lower to version 4.5, the high/low packet classification

settings according to the old VLAN Priority Threshold or IP Precedence Threshold parameters

will be lost. The new parameters are forced to the default value of 7, meaning no prioritization.

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When downgrading from version 4.5 to version 3.0 or lower the MIR value is changed to the

default 14976 and can manually be set to any value up to the maximum of 32896.

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When Wireless Link Prioritization feature is activated the prevention of Low Priority Traffic

Starvation is automatically disabled.

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Remote changes of the Maximum Modulation Level in an SU while Adaptive Modulation is

disabled may lead to lose of connectivity with the unit. The recommended workaround is to

enable Adaptive Modulation, reset the unit to apply the change, and then change the

Maximum Modulation Level.

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Adaptive Modulation may not converge to best modulation in some setups with high variance

in noise levels. In these cases better performances may be achieved with manual modulation

settings (Adaptive Modulation Disabled).

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When using the Q-in-Q feature the units can be managed by a management station behind the

AU only if the following conditions are met:

The unit can be managed only with tagged frames: VLAN ID – Management must be other

than 65535 (None).

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