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LANCOM ES-2126+ und LANCOM ES-2126P
Chapter 4: Operation of Web- based Management
78
Current Max. Age: Show the current root bridge maximum age time.
Maximum age time is used to monitor if STP topology needs to
change. When a bridge does not receive a hello message from root
bridge until the maximum age time is counted down to 0, the bridge
will treat the root bridge malfunctioned and issue a Topology Change
Notification (TCN) BPDU to all other bridges.
All bridges in the LAN will re-learn and determine which the root
bridge is. Maximum Age time is assigned by root bridge in unit of
seconds. Default is 20 seconds.
Current Forward Delay: Show the current root bridge forward delay
time. The value of Forward Delay time is set by root. The Forward
Delay time is defined as the time spent from Listening state moved to
Learning state or from Learning state moved to Forwarding state of a
port in bridge.
Hello Time: Show the current hello time of the root bridge. Hello time
is a time interval specified by root bridge, used to request all other
bridges periodically sending hello message every "hello time" seconds
to the bridge attached to its designated port.
STP Topology Change Count: STP Topology Change Count expresses
the time spent in unit of seconds since the beginning of the Spanning
Tree Topology Change to the end of the STP convergence. Once the
STP change is converged, the Topology Change count will be reset to
0. The figures showing in the screen may not be the exact time it spent
but very close to, because the time is eclipsing.
Time Since Last Topology Change: Time Since Last Topology Change is
the accumulated time in unit of seconds the STP has been since the
last STP Topology Change was made. When Topology Change is initi-
ated again, this counter will be reset to 0. And it will also count again
once STP topology Change is completed.
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