HP PS1810 SERIES Management And Configuration Manual Download

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Status

Spanning Tree

Root Path Cost

The sum of the Port Path costs on the least cost path to the Root bridge. For the Root bridge this is
zero.

Root Port

The port on the switch that forwards traffic toward the Spanning Tree root.

Topology Change
Count

Number of topology changes since STP was enabled.

Time Since Last
Change

Time since last topology change was detected.

Spanning Tree Interface Status

Root Guarded
Interfaces

Interfaces with the Root Guard parameter currently set.

TCN Guarded
Interfaces

Interfaces with the TCN Guard parameter currently set.

BPDU Protected
Interfaces

Interfaces with the BPDU Guard parameter currently set.

BPDU Filtered
Interfaces

Interfaces with the BPDU FIlter parameter currently set.

Interface

The port number.

Interface ID

The priority and port index used by the Spanning Tree protocol.

Role

The current Spanning Tree port role. The port role can be one of the following values:
•

RootPort—

A forwarding port that is the best port from non-root bridge to Root bridge.

•

DesignatedPort—

Each LAN segment has one designated port, a single bridge port to which

packets destined toward the Root bridge are sent.

•

AlternatePort—

When the Designated port is currently on a different bridge, the Alternate Port

is a port on this bridge that may become the Designated port if needed.

•

BackupPort—

When the Designated port is currently a different port on this bridge, the Backup

port is a port on this bridge that can become the Designated port if needed.

•

DisabledPort—

Not strictly part of the Spanning Tree protocol; a network administrator can

manually disable the port.

State

The current Spanning Tree port state. The port state can be one of the following values:
•

Blocking—

A port that may cause a switching loop, no user data is sent or received but it may

go into forwarding mode if the other links in use were to fail and the spanning tree algorithm
determines the port may transition to the forwarding state. BPDU data is still received in blocking
state.

•

Forwarding—

A port receiving and sending data. STP still monitors incoming BPDUs that may

indicate it should return to the blocking state to prevent a loop.

•

Disabled—

Not strictly part of STP, a network administrator can manually disable a port.

Cost

The current Spanning Tree port path cost. This value is either computed from the Auto setting or
from any explicitly configured value.

Hello Time

Hello time parameter currently in use on the port

Point-to-Point

A yes/no value. Yes indicates a switched link with only two nodes. No indicates a shared network
segment with more than two nodes. The value may be automatically computed or explicitly
configured.

Edge

A yes/no value. Yes means there are no bridges attached to this port. No means there are, or might
be, bridges attached. The value may be automatically computed or explicitly configured. If the value
is Yes, the port transitions directly to the Forwarding Port state when Spanning Tree is enabled.

Field

Description