Spanning Tree Algorithm
112
Instruction Manual - NXA-ENET8-POE+
The criteria used for determining the port role is based on root bridge ID, root path cost, designated bridge, designated port, port
priority, and port number, in that order and as applicable to the role under question.
Perform these steps to display interface settings for STA:
1.
Click
Spanning Tree
>
STA
.
2.
Select
Configure Interface
from the Step list.
3.
Select
Show Information
from the Action list.
FIG. 119
STA Port Roles
FIG. 120
Displaying Interface Settings for STA
R
A
D
B
R
R: Root Port
A: Alternate Port
D: Designated Port
B: Backup Port
Alternate port receives more
useful BPDUs from another
bridge and is therefore not
selected as the designated
port.
R
R
A
D
B
Backup port receives more
useful BPDUs from the use
bridge and is therefore not
selected as the designated
port.