HP PS1810 Management And Configuration Manual page 29

Field Description
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 Number of topology changes since STP was enabled.
Count
Time Since Last Time since last topology change was detected.
Change
Spanning Tree Interface Status
Root Guarded Interfaces with the Root Guard parameter currently set.
Interfaces
TCN Guarded Interfaces with the TCN Guard parameter currently set.
Interfaces
BPDU Protected Interfaces with the BPDU Guard parameter currently set.
Interfaces
BPDU Filtered Interfaces with the BPDU FIlter parameter currently set.
Interfaces
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—
•
DesignatedPort—
•
packets destined toward the Root bridge are sent.
AlternatePort—
•
is a port on this bridge that may become the Designated port if needed.
BackupPort—
•
port is a port on this bridge that can become the Designated port if needed.
DisabledPort—
•
manually disable the port.
State The current Spanning Tree port state. The port state can be one of the following values:
Blocking—
•
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—
•
indicate it should return to the blocking state to prevent a loop.
Disabled—
•
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.
A forwarding port that is the best port from non-root bridge to Root bridge.
Each LAN segment has one designated port, a single bridge port to which
When the Designated port is currently on a different bridge, the Alternate Port
When the Designated port is currently a different port on this bridge, the Backup
Not strictly part of the Spanning Tree protocol; a network administrator can
A port that may cause a switching loop, no user data is sent or received but it may
A port receiving and sending data. STP still monitors incoming BPDUs that may
Not strictly part of STP, a network administrator can manually disable a port.
Status
Spanning Tree
2-13