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4.15.1 STP S
TATUS
In the Spanning Tree Status, user can read 12 parameters to know STP current status. The 12 parameters'
description is listed in the following table.
Parameter
STP State
Bridge ID
Bridge Priority
Designated Root
Designated Priority
Root Port
Root Path Cost
Current Max. Age
Current Forward Delay
Hello Time
Table 4-36. STP Status screen options.
Description
Show the current STP Enabled / Disabled status. Default is Disabled.
Show switch's bridge ID which stands for the MAC address of this
switch.
Show this switch's current bridge priority setting. Default is 32768.
Show root bridge ID of this network segment. If this switch is a root
bridge, the Designated Root will show this switch's bridge ID.
Show the current root bridge priority
Show port number connected to root bridge with the lowest path cost.
Show the path cost between the root port and the designated port of
the root bridge.
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.
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.
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.
CHAPTER 4: Web-Based Management
69
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