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 This field displays the current state of the Topology Change Flag of this Bridge instance. Topology Change Count This field displays the number of times where the topology change flag has been set (during a one-second interval). Topology Change Last This field displays the time passed since the Topology Flag was last set. CIST Ports & Aggregations State Port This column displays the switch port number of the logical STP port. Port ID This column displays the port id as used by the STP protocol. This is the priority part and the logical port index of the bridge port. Role This column displays the current STP port role. The port role can be one of the following values:
5.25.2
AlternatePort
BackupPort
RootPort
DesignatedPort
State This column displays the current STP port state. The port state can be one of the following values:
Discarding
Learning
Forwarding
Path Cost This column displays the current STP port path cost. This will either be a value computed from the Auto setting, or any explicitly configured value. Edge This column displays 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.
SMB - CLI UM
Rev: 1.1
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