AD B
x
Backup port receives more
useful BPDUs from the same
bridge and is therefore not
selected as the designated
port.
RR
AD B

x

• Trunk Member – Indicates if a port is a me mber of a tr unk.
(STA Port Information only)

10-11

• Designated Port – The port priority and numbe r of th e port on t he designat ed
bridging device through which this switch must co mmunic ate with the root of t he
Spanning Tree.
• Oper Path Cost – The contribution of this port to the path cost of paths towards
the spanning tree root which include this port.
• Oper Link Type – The operational po int-t o-point sta tus of the LAN segme nt
attached to this interface. This parameter is determined by manual configuration or
by auto-detection, as described for Admin Link Type in STA Port Configuration on
page 10-13.
• Oper Edge Port – This parameter is initialized to the setting for Admin Edge Port
in STA Port Configuration on page 10-13 (i.e., true or false), but will b e set to false
if a BPDU is received, indicating that another bridge is attached to this p ort.
• Port Role – Roles are assigne d accordi ng to whethe r the por t is part of the a cti ve
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), or 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 ar e remov ed . The ro le is
set to disabled (i.e., disabled port) if a port ha s no role wit hin the spann ing tre e.
A
lternate port receives more
useful BPDUs from another
bridge and is therefore not
selected as the designated
port. R
R: Root Port
A: Alternate Port
D: Designated Port
B: Backup Port
R

Displaying Interface Settings

10