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348 Configuring Switch Information
•
Role —
Indicates the port role assigned by the STP algorithm in order to provide to STP paths.
The possible field values are:
–
Root
— Provides the lowest cost path to forward packets to root device.
–
Designated
— Indicates the port or LAG via which the designated device is attached to the LAN.
–
Alternate
— Provides an alternate path to the root device from the root interface.
–
Backup
— Provides a backup path to the designated port path toward the Spanning Tree leaves.
Backup ports occur only when two ports are connected in a loop by a point-to-point link. Backup
ports also occur when a LAN has two or more connections connected to a shared segment.
–
Disabled
— Indicates the port is not participating in the Spanning Tree.
•
Interface Priority
—
Defines the interface priority for specified instance. The default value is 128.
•
Path Cost
— Indicates the port contribution to the Spanning Tree instance. The possible range
is 1-200,000,000.
•
Default Path Cost
— Indicates if the default path cost is used. The possible values are:
–
Checked
— Default path cost is used.
–
Unchecked
— Path cost is user-defined.
•
Designated Bridge ID —
The bridge ID number that connects the link or shared LAN to the root.
•
Designated Port ID —
The Port ID number on the designated bridge that connects the link or the
shared LAN to the root.
•
Designated Cost —
Cost of the path from the link or the shared LAN to the root.
•
Forward Transitions —
Number of times the port changed to the forwarding state.
•
Remain Hops —
Indicates the number of hops remaining to the next destination.
Defining MSTP Interface Settings
1
Open the
MSTP Interface Settings
page.
2
Select an interface.
3
Define the fields.
4
Click
Apply Changes
.
MSTP parameters are defined, and the device is updated.