System information

SIGNAMAX a.s.
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Hello Time is used to determine the periodic time to send normal BPDU from
designated ports among bridges. It decides how long a bridge should send this
message to other bridge to tell I am alive. When the 065-7851 is the root bridge of
the LAN, for example, all other bridges will use the hello time assigned by this
switch to communicate with each other. The valid value is 1 ~ 10 in unit of second.
Default is 2 seconds.
Max. Age:
When the 065-7851 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 backward compatible with STP (802.1d).