Lancom ES-2126+ Manual page 90

LANCOM ES-2126+ and LANCOM ES-2126P+
Chapter 4: Operation of Web- based Management
other bridges will use the hello time assigned by this switch to com-
municate with each other. The valid value is 1 ~ 10 in unit of second.
Default is 2 seconds.
Max. Age: When the switch is the root bridge, the whole LAN will
apply this figure set by this switch as their maximum age time. When
a bridge received a BPDU originated from the root bridge and if the
message age conveyed in the BPDU exceeds the Max. Age of the root
bridge, 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-calculate and determine who the root
bridge is. The valid value of Max. Age is 6 ~ 40 seconds. Default is 20
seconds.
Forward Delay: You can set the root bridge forward delay time. This
figure is set by root bridge only. The forward delay time is defined as
the time spent from Listening state moved to Learning state and also
from Learning state moved to Forwarding state of a port in bridge. The
forward delay time contains two states, Listening state to Learning
state and Learning state to Forwarding state. It assumes that forward
delay time is 15 seconds, then total forward delay time will be 30
seconds. This has much to do with the STP convergent time which will
be more than 30 seconds because some other factors.
The valid value is 4 ~ 30 seconds, default is 15 seconds.
Force Version: Two options are offered for the user's choosing STP
algorithm. One is RSTP and the other is STP. If STP is chosen, RSTP will
run as a legacy STP. The switch supports RSTP (802.1w) which is back-
ward compatible with STP (802.1d).
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