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Dell POWERCONNECT 5524P - Page 437

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Dell PowerConnect 55xx Systems User Guide 437
BPDU Guard
— Check to enable BPDU Guard on the port.
Root Guard
— Check to prevent devices outside the network core
from being assigned the spanning tree root.
Port State
— Displays the current STP state of a port. If the port state
is not disabled, it determines what forwarding action is taken on
traffic. The possible port states are:
Disabled
— STP is currently disabled on the port. The port
forwards traffic while learning MAC addresses.
Blocking
— The port is currently blocked and cannot be used to
forward traffic or learn MAC addresses. Blocking is displayed
when Classic STP is enabled.
Listening
— The port is currently in the listening mode. The port
cannot forward traffic nor can it learn MAC addresses.
Learning
— The port is currently in the learning mode. The port
cannot forward traffic, however it can learn new MAC addresses.
Forwarding
— The port is currently in the forwarding mode. The
port can forward traffic and learn new MAC addresses.
Role
— Displays the port role assigned by the STP algorithm that
provides STP paths. The possible options are:
Root
— This port provides the lowest cost path to forward packets
to root switch.
Designated
— This port is the interface through which the bridge
is connected to the LAN, which provides the lowest cost path
from the LAN to the Root Bridge.
Alternate
— This port provides an alternate LAG to the root
switch from the root interface.
Backup
— This port provides a backup path to the designated
port. Backup ports occur only when two ports are connected in a
loop by a point-to-point link. Backup ports also occur when a LAN
has two or more connections connected to a shared segment.
Disabled
— This port is not participating in the Spanning Tree.

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