Summit WM3000 Series Controller System Reference Guide 225
Guard Root
Displays whether the listed port index enforces root bridge placement.
The guard root ensures the port is a designated port. Typically, each
guard root port is a designated port, unless two or more ports (within the
root bridge) are connected together. If the bridge receives superior
(BPDUs) on a guard root-enabled port, the guard root moves the port to a
root-inconsistent STP state. This state is equivalent to a listening state.
No data is forwarded across the port. Thus, the guard root enforces the
root bridge position.
AdminPort PortFast
BPDU Filter
Displays the portfast BPDU filter for the admin port. The Spanning Tree
Protocol sends BPDUs from all ports.
Enabling the BPDU Filter ensures PortFastenabled admin ports do not
transmit or receive BPDUs.
OperPort PortFast
Bpdu Filter
Displays a portfast BPDU filter for the oper port.
Enabling the BPDU Filter feature ensures PortFastenabled oper ports do
not transmit or receive BPDUs.
AdminPort PortFast
Bpdu Guard
Displays the whether BPDU Guard is currently enabled for this port.
When set for a bridge, all portfast-enabled ports having the
bpdu-guard set to default shut down the port on receiving the BPDU.
When this occurs, the BPDU is not processed.
OperPort PortFast
Bpdu Guard
Displays the whether BPDU Guard is currently enabled for this port.
When the OperPort PortFast BPDU Guard feature is set for a bridge, all
portfast-enabled ports that have the bpdu-guard set to default shut down
the port on receiving a BPDU. When this occurs, the BPDU is not
processed.
Port Version
Displays the port version associated with this instance. It can be either of
the following:
• STP
• RSTP
• MSTP
Port State
Port State Displays the MSTP state for this port. A port must be enabled
to be able to forward.
Port Enable
Displays the enable/disable MSTP designation of each port. A green
check mark indicates the Oper MAC Enable status is active/enabled.
Port Path Cost
Port Path Cost Displays the path cost for the specified port index. The
default path cost depends on the speed of the interface.
Speed Default path cost
<=100000 bits/sec 200000000
<=1000000 bits/sec 20000000
<=10000000 bits/sec 2000000
<=100000000 bits/sec 200000
<=1000000000 bits/sec 20000
<=10000000000 bits/sec 2000
<=100000000000 bits/sec 200
<=1000000000000 bits/sec 20
>1000000000000 bits/sec 2
Port Designated Cost
Displays the port cost for each port on the controller. The cost helps
determine the role of the port in the MSTP network. The designated cost
is the cost for a packet to travel from this port to the root in the MSTP
configuration. The slower the media, the higher the cost.
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