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CHAPTER 6: SPANNING TREE
FIGURE 6-5. STP STATUS SCREEN
PARAMETER DESCRIPTION
MSTI: The Bridge Instance. This is also a link to the STP Detailed Bridge Status.
Bridge ID: The Bridge ID of this Bridge instance.
Root ID: The Bridge ID of the currently selected root bridge.
Root Port: The switch port currently assigned the root port role.
Root Cost: Root Path Cost. For the Root Bridge it is zero. For all other Bridges, it is the sum of the Port Path Costs on the least cost
path to the Root Bridge.
Topology Flag: The current state of the Topology Change Flag of this Bridge instance.
Topology Change Last: The time since the last Topology Change occurred.
STP Port Status
Port: The switch port number of the logical STP port.
CIST Role: The current STP port role of the CIST port. The port role can be one of the following values: AlternatePort, Backup Port,
RootPort, DesignatedPort Disabled.
CIST State: The current STP port state of the CIST port. The port state can be one of the following values: Blocking, Learning or
Forwarding.
Uptime: The time since the bridge port was last initialized.
Buttons
Auto-refresh: Check this box to refresh the page automatically. Automatic refresh occurs every 3 seconds.
Refresh: Click to refresh the page.
CIST: Click to next page “STP Detailed Bridge Status.”
