D-Link DWS-3227 - xStack Switch - Stackable, Руководство по установке в сети

Страница: 204 / 372

Configuring Spanning Tree
Defining Multiple Spanning Tree
Page 203
–
Root — Provides the lowest cost path to forward packets to the root device.
–
Designated — Indicates the port or LAG through 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 or when a LAN has two or
more connections connected to a shared segment.
–
Disabled — Indicates the port is not participating in the Spanning Tree.
•
Mode — Indicates the STP mode by which STP is enabled on the device. The possible field values are:
–
Classic STP — Classic STP is enabled on the device. This is the default value.
–
Rapid STP — Rapid STP is enabled on the device.
–
Multiple STP — Multiple STP is enabled on the device.
•
Interface Priority — Defines the interface priority for the specified instance. The default value is 128.
•
Path Cost — Indicates the port contribution to the Spanning Tree instance. The range should always be 1-
200,000,000.
•
Designated Bridge ID — Displays the ID of the bridge that connects the link or shared LAN to the root.
•
Designated Port ID — Displays the ID of the port on the designated bridge that connects the link or the
shared LAN to the root.
•
Designated Cost — Indicates that the default path cost is assigned according to the method selected on the
Spanning Tree Global Settings page.
•
Forward Transitions — Indicates the number of times the LAG State has changed from a Forwarding state
to a Blocking state.
•
Remain Hops — Indicates the hops remaining to the next destination.
2. Click . The MSTP Interface Table opens.