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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.
• 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).
• In units running SW Version 4.0, 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:
Management VLAN ID in the AU is identical to the Service provider VLAN ID configured in
the SU.
Management VLAN ID in the SU must be configured to 65535 (no VLAN). This means that
the SU will accept untagged management frames from the Ethernet port. From the
wireless port it will accept only tagged frames with a VLAN ID tag that matches the defined
Service Provider VLAN ID.
IMPORTANT NOTE: an AU operating in Service Provider link mode with VLAN ID –
Management = 65535 cannot be managed from either the Ethernet or wireless ports.
Following the improvements introduced in SW Version 4.0.27, the above limitations
were removed. For more details refer to Improved “Management Functionality in Q in Q
Mode” on page 6.
• Upon upgrade to SW version 4.0 from a lower version the FTP Client IP Address and Subnet
Mask do no longer exist as configurable parameters and the unit's IP parameters are used
instead. Upon downgrade from SW version 4.0 to a lower version the FTP Client IP Address of
the unit is automatically set to the same value as the IP Address of the device. In this case
following warning message appears:
*** WARNING: Same 'Unit IP Address' and 'FTP Client IP Address'! ***
*** 'FTP Client IP Address' ignored until change and reset! ***
After downgrade it is recommended changing the FTP Client IP Address to 1.1.1.3 and the
FTP Server IP Address to 1.1.1.4.
ALVARION LTD.
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TEL AVIV, 69710,
ISRAEL
TEL: 972-3-6456262
FAX: 972-3-6456222
HTTP://WWW.ALVARION.COM
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