Alvarion BREEZEACCESS SW VERSION 5.1 - Manual (Page 153)

Menus and Parameters
Operation and Administration
121
‘ Sp (Special): 3 addresses that are always present, including:
¾ The MAC address of the AU.
¾ Alvarion's Multicast address (01-20-D6-00-00-01. The system treats this
address as a Broadcast address.
¾ 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 Units 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.
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).
‘ 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.
„ Display Association Info: Displays information regarding the Subscriber
Units associated with the AU. Each list entry includes the following
information:
‘ The MAC Address of the associated Subscriber Unit
‘ Age in seconds, indicating the elapsed time since receiving the last packet
from the Subscriber Unit.