Spanning Tree - STP
Spanning tree – View - STP Bridges
Microsemi PDS-408G Web Management User Guide Ver. 1.0.1, 03-2019
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•
Bridge ID
- The Bridge ID of this Bridge instance.
•
Root ID
- The Bridge ID of the currently elected root bridge.
•
Root Port
- The switch port currently assigned the
root
port role.
•
Root Cost
- Root Path Cost. For the Root Bridge this is zero. For all other Bridges, it is the sum
of the Port Path Costs on the least cost path to the Root Bridge.
•
Regional Root
- The Bridge ID of the currently elected regional root bridge, inside the MSTP
region of this bridge.
(For the CIST instance only)
.
•
Internal Root Cost
- The Regional Root Path Cost. For the Regional Root Bridge this is zero.
For all other CIST instances in the same MSTP region, it is the sum of the Internal Port Path
Costs on the least cost path to the Internal Root Bridge.
(For the CIST instance only)
.
•
Topology Flag
-The current state of the Topology Change Flag of this Bridge instance.
•
Topology Change Count
- The number of times where the topology change flag has been set
(during a one-second interval).
•
Topology Change Last
- The time passed since the Topology Flag was last set.
8.4.2
CIST Ports & Aggregation State
•
Port
- The switch port number of the logical STP port.
•
Port ID
- The port id as used by the STP protocol. This is the priority part and the logical port
index of the bridge port.
•
Role
- The current STP port role. The port role can be one of the following values:
o
AlternatePort
o
BackupPort
o
RootPort
o
DesignatedPort
•
State
- The current STP port state. The port state can be one of the following values: Discarding
Learning Forwarding.
•
Path Cost
- The current STP port path cost. This will either be a value computed from the Auto
setting, or any explicitly configured value.
•
Edge
- The current STP port (operational) Edge Flag. An Edge Port is a switch port to which no
Bridges are attached. The flag may be automatically computed or explicitly configured. Each Edge
Port transits directly to the Forwarding Port State, since there is no possibility of it participating in a
loop.
•
Point-to-Point
- The current STP port point-to-point flag. A point-to-point port connects to a non-
shared LAN media. The flag may be automatically computed or explicitly configured. The point-to-
point properties of a port affect how fast it can transit to STP state.
•
Uptime
- The time since the bridge port was last initialized.
Bridge ID
-The Bridge ID of this Bridge instance.
Root ID
- The Bridge ID of the currently elected root bridge.