Table 4-33 (Continued). STP Configuration screen options.
Parameter Description
Hello Time
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 PSES-2126Cis 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 PSES-2126Cis 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).
4.11.3 STP P
ORT
C
ONFIGURATION
In the STP Port Setting, one item selection and five
parameters settings are offered for user’s setup. User can
disable and enable each port by selecting each Port Status item. User also can set
Path Cost
and
Priority
of
each port by filling in the desired value and set
Admin Edge Port
and
Admin Point To Point
by selecting the
desired item.
CHAPTER 4: Web-Based Management
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