8- and 24-Port Gigabit L2 Managed Power-over-Ethernet (PoE) Switches
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Parameter description:
STP State: Show the current STP Enabled / Disabled status. Default is “Disabled.”
Bridge ID: Show the switch’s bridge ID (it stands for the switch’s MAC address.)
Bridge Priority: Show this switch’s current bridge priority setting. Default is 32768.
Designated Root: 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.
Designated Priority: Show the current root bridge priority.
Root Port: Show the port number connected to root bridge with the lowest path cost.
Root Path Cost: Show the path cost between the root port and the designated port of the root bridge.
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 the root bridge until the maximum age time counts down to 0, the
bridge will malfunction and issue a Topology Change Notification (TCN) BPDU to all other bridges.
All bridges in the LAN will re-learn and determine which bridge is the root. Maximum Age time is assigned by the root bridge in units
of seconds. The default is 20 seconds.
Current Forward Delay: Shows 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 bridge port.
Hello Time: Shows 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 a 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 reset to 0..
Time Since Last Topology Change: Time Since Last Topology Change is the accumulated time elapsed in unit of seconds since the last
STP Topology Change was made. When Topology Change is initiated again, this counter will reset to 0. It will also count again once
the STP topology Change is completed.
4.14.2 Configuration
The STP, Spanning Tree Protocol, includes RSTP. In the Spanning Tree Configuration, there are six
parameters open for the user to
configure. Each parameter description is listed below.
Function name:
STP Configuration
Function description: You can set the following Spanning Tree parameters to control STP function enable/disable, select mode
RSTP/STP, and affect STP state machine behavior to send BPDU in this switch. The default setting of Spanning Tree Protocol is
“Disable.”