Priority:
Enter the value of port priority from 0 to 240, which is divisible by 16,
and the default value is 128.
The port with the lower value has the higher priority. In the same
condition, the port with the highest priority will be elected as the root
port in the desired instance.
Path Cost:
Enter the value of the path cost. The default setting is Auto, which
means the port calculates the path cost automatically according to
the port’s link speed.
It is the path cost of the port in the desired instance. The port with
the lowest path cost will be elected as the root of the desired
instance.
Port Role:
Displays the role that the port plays in the desired instance.
Root Port
: Indicates the port is the root port.
Designated Port
: Indicates the port is the designated port.
Alternate Port
: Indicates the port is a backup of a root port.
Backup Port
: Indicates the port is a backup of a designated port.
Disabled
: Indicates the port is not participating in the spanning tree.
Port Status:
Displays the port status.
Forwarding
: The port receives and sends BPDUs, and forwards user
data.
Learning
: The port receives and sends BPDUs, and drops the other
packets.
Blocking
: The port only receives BPDUs and drops the other
packets.
Disconnected
: The port is enabled with spanning tree function but
not connected to any device.
LAG:
Displays the LAG which the port belongs to.
Note:
The port status of one port in different spanning tree instances can be different.
Global configuration Procedure for Spanning Tree function:
Step Operation
Description
1
Make clear roles the switches
play in spanning tree
instances: root bridge or
designated bridge
Preparation.
2
Globally configure Spanning
Tree parameters.
Required.
Enable Spanning Tree function on the switch
and configure MSTP parameters on
Spanning
Tree
→
STP Config
→
STP Config
page.
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