Digisol DG-FS4528P, Management Manual

Page: 302 / 973

C
HAPTER
11 | Spanning Tree Algorithm
Displaying Interface Settings for STA
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Port Role – Roles are assigned according to whether the port is part of
the active topology connecting the bridge to the root bridge (i.e., root
port), connecting a LAN through the bridge to the root bridge (i.e.,
designated port), is the MSTI regional root (i.e., master port), or is
an alternate or backup port that may provide connectivity if other
bridges, bridge ports, or LANs fail or are removed. The role is set to
disabled (i.e., disabled port) if a port has no role within the spanning
tree.
Figure 144: STA Port Roles
W
EB
I
NTERFACE
To display interface settings for STA:
1.
Click Spanning Tree, STA, Port Information.
Figure 145: Displaying Interface Settings for STA
Alternate port receives more
useful BPDUs from another
bridge and is therefore not
selected as the designated
port.
x
R: Root Port
A: Alternate Port
D: Designated Port
B: Backup Port
R R
A D B
Backup port receives more
useful BPDUs from the same
bridge and is therefore not
selected as the designated
port.
x
R R
A D B