Chapter 5 | Advanced Configuration |
Spanning Tree > MSTP Instance Settings
Spanning Tree > MSTP Instance Settings
MSTP operation maps VLANs into STP instances. Packets assigned to various VLANs are transmitted along different paths within Multiple Spanning Trees Regions (MST Regions). Regions are one or more Multiple Spanning Tree bridges by which frames can be transmitted. In configuring MST, the MST region to which the device belongs is defined. A configuration consists of the name, revision, and region to which the device belongs.
Network Administrators can define MSTP Instances settings using the MSTP Instance Settings screen.
Instance ID Defines the VLAN group to which the interface is assigned.
Included VLAN Maps the selected VLAN to the selected instance. Each VLAN belongs to one instance.
Bridge Priority Specifies the selected spanning tree instance device priority. The field range is
Designated Root Bridge ID Indicates the ID of the bridge with the lowest path cost to the instance ID.
Root Port Indicates the selected instance’s root port.
Root Path Cost Indicates the selected instance’s path cost.
Bridge ID Indicates the bridge ID of the selected instance.
RemainingHops Indicatesthenumberofhopsremaining to the next destination.
Spanning Tree > MSTP Interface Settings
Spanning Tree > MSTP Interface Settings
Network Administrators can assign MSTP Interface settings using the MSTP Interface Settings screen.
The MSTP Interface Settings screen contains the following fields:
Instance ID Lists the MSTP instances configured on the device. Possible field range is
Interface Displays the interface for which the MSTP settings are displayed. The possible field values are:
•• Port Specifies the port for which the MSTP settings are displayed.
•• LAG Specifies the LAG for which the MSTP settings are displayed.
Port State Indicates whether the port is enabled for the specific instance.
Type Indicates if the port is a
•• Boundary Port Indicates the port is a boundary port. A Boundary port attaches MST bridges to LAN in an outlying region. If the port is a boundary port, it also indicates whether the device on the other side of the link is working in RSTP or STP mode.
•• Master Port Indicates the port is a master port. A Master port provides connectivity from a MSTP region to the outlying CIST root.
•• Internal Indicates the port is an internal port.
Role Indicates the port role assigned by the STP algorithm inordertoprovidetoSTPpaths.Thepossiblefieldvaluesare:
45 |
