Alvarion BreezeACCESS 4900 Specifications Page 127

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Chapter 4 - Operation and Administration Menus and Parameters
BreezeACCESS 4900 101 System Manual
from the AU, IP Address, Wi2 IP Address as defined in the SU (or 0.0.0.0 for
none), ESSID.
» X: An SU that is included in the Deny List.
» Sp (Special): 3 addresses that are always present, including:
The MAC address of the AU.
The Multicast address (01-20-D6-00-00-01). The system treats this
address as a Broadcast address.
The Ethernet Broadcast address (FF-FF-FF-FF-FF-FF).
In addition, a summary table displays information about the Forwarding
Database (Bridging Info) and the Associated Subscriber Unit’s Database
(Association Info). Each database includes the following information:
» The current number of entries. For Bridging Info this includes the Et
(Ethernet) and the Vp (Virtual ports) entries. For Association Info this is
the number of the currently associated SUs.
» The aging time specified for entries in these tables. The aging time for
Bridging Info is as specified by the Bridge Aging Time parameter. The
default is 300 seconds. There is no aging time for Association Info entries.
» The maximum number of entries permitted for these tables, which is 1021
(1024 minus the number of special Sp addresses as defined above) for
Bridging Info and as specified by the Maximum Number of Associations
parameter for Association Info. The default value of the Maximum Number
of Associations parameter is 512.
NOTE
An SU is only removed from the list of associated SUs under the following conditions:
The SU failed to respond to 100 consecutive data frames transmitted by the AU and is
considered to have "aged out".
During the last 6 minutes (or more) the SU did not transmit any data frame, and failed to
respond to certain frames that typically are transmitted by the AU every 10 seconds. Since the
sampling interval for this state is about 10 minutes, it means that the decision to remove the SU
from the Associations Database will take place between 6 to 16 minutes from the time the SU
ceased sending data or responding to these "keep-alive" frames (for AUS the sampling interval
is 1 minute, meaning decision time of 6 to 7 minutes).
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