To view the CIST Port tab:
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Step | Action |
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1 |
From the Device Manager menu bar, choose VLAN > Spanning Tree > MSTP. The MSTP dialog box appears with the Globals tab displayed. |
2 |
Click the CIST Port tab. The CIST Port tab appears. |
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--End-- | |
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Variable | Value | |
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Port | The port number of the port containing Spanning Tree information. | |
PathCost | The contribution of this port to the cost of paths towards the CIST Root. | |
Priority | The four most significant bits of the Port Identifier of the Spanning Tree instance. It can be modified by setting the CistPortPriority value. The values that are set for Port Priority must be in steps of 16. | |
DesignatedRoot | This field specifies the unique Bridge Identifier of the bridge. Recorded as the CIST Root in the configuration BPDUs which are transmitted. | |
DesignatedCost | The path cost of the Designated Port of the segment connected to this port. | |
DesignatedBridge | The unique Bridge Identifier of the bridge which the port considers to be the Designated Bridge for the port segment. | |
DesignatedPort | The Port identifier of the port on the Designated Bridge which is designated for the port segment. | |
RegionalRoot | Displays the unique Bridge Identifier of the bridge. Recorded as the CIST Regional Root Identifier in the configuration BPDUs which are transmitted. | |
RegionalPathCost | The contribution of this port to the cost of paths towards the CIST Regional Root. | |
ProtocolMigration | Indicates the Protocol migration state of this port. When operating in MSTP mode, set this field to true to force the port
to transmit MSTP BPDUs without instance information.
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AdminEdgeStatus | The administrative value of the Edge Port parameter. A value of true indicates that this port can be assumed to be an edge-port, and a value of false indicates that this port can be assumed to be a nonedge-port. | |
OperEdgeStatus | Signifies the operational value of the Edge Port parameter. This value is initialized to the value of AdminEdgeStatus and set to false when the port receives a BPDU. | |
AdminP2P | The administrative point-to-point status of the LAN segment attached to this port. A value of 0 indicates that this port is always treated as being connected to a point-to-point link. A value of 1 indicates that this port is treated as having a shared media connection. A value of 2 indicates that this port is considered to have a point-to-point link if it is an Aggregator and all of its members are aggregatable, or if the MAC entity is configured for full duplex operation, either through auto-negotiation, or by management means. | |
OperP2P | This field indicates the operational point-to-point status of the LAN segment attached to the port. It also indicates whether a port is considered to have a point-to-point connection. The value is determined by management or by auto-detection, as described in the AdminP2P object. | |
HelloTime | The amount of time between the transmission of Configuration BPDUs transmitted by this node on the port. Measured in units of hundredths of a second. | |
OperVersion | This indicates whether the Port is operationally in the MSTP, RSTP, or STP-compatible mode; that is, whether the port is transmitting MST BPDUs, RST BPDUs, or Config/TCN BPDUs. | |
EffectivePortState | The effective operational state of the port for CIST. This is set to true only when the port is operationally up in the Interface level and Protocol level for CIST. This is set to false for all other times. | |
State | The current state of the port as defined by the Common Spanning Tree Protocol. | |
ForcePortState | The current state of the port which can be changed to either Disabled or Enabled for the base Spanning Tree instance. | |
SelectedPortRole | Selected port role for the Spanning Tree instance. | |
CurrentPortRole | Current port role for the Spanning Tree instance. |