Viewing CIST port information using EDM

Use this procedure to display CIST port information.

Prerequisites

Procedure steps


Step Action

1

From the navigation tree, double-click VLAN.

2

In the VLAN tree, double-click Spanning Tree.

3

In the Spanning Tree tree, double-click MSTP.

4

On the work area, click the CIST Ports tab.


--End--

Variable Definitions

Variable Value
Port Specifies the port number of the port containing Spanning Tree information.
PathCost Specifies the contribution of this port to the cost of paths towards the CIST Root.
Priority Specifies 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 Specifies the unique Bridge Identifier of the bridge. Recorded as the CIST Root in the configuration BPDUs which are transmitted.
DesignatedCost Specifies the path cost of the Designated Port of the segment connected to this port.
DesignatedBridge Specifies the unique Bridge Identifier of the bridge which the port considers to be the Designated Bridge for the port segment.
DesignatedPort Specifies 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 Specifies the contribution of this port to the cost of paths towards the CIST Regional Root.
ProtocolMigration Specifies 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.
Attention

If this field is set to true and the port receives an 802.1D BPDU, the port begins transmitting 802.1D BPDUs. If the port receives an 802.1w BPDU, it begins transmitting 802.1w BPDUs.

AdminEdgeStatus Specifies 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 Specifies 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 Specifies 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 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 autodetection, as described in the AdminP2P object.
HelloTime Specifies 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 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 Specifies the 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 Specifies the current state of the port as defined by the Common Spanning Tree Protocol.
ForcePortState Specifies the current state of the port which can be changed to either Disabled or Enabled for the base Spanning Tree instance.
SelectedPortRole Specifies the selected port role for the Spanning Tree instance.
CurrentPortRole Specifies the current port role for the Spanning Tree instance.