Dell PowerConnect 35 SERIES, User Manual

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Configuring Switch Information
Figure 7-40. Rapid Spanning Tree (RSTP)
The Spanning Tree RSTP page contains the following fields:
• Interface — Port or LAG for which you can view and edit RSTP settings.
• State — Disables RSTP state of the selected interface.
• Role —Indicates the port role assigned by the STP algorithm in order to provide STP paths.
The possible field values are:
– Root —Provides the lowest cost path to forward packets to root switch.
– Designated —Indicates that the port or LAG via which the designated switch is attached to the LAN.
– Alternate —Provides an alternate path to the root switch 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.
• Mode —Indicates the current Spanning Tree mode. The Spanning Tree mode is selected in the
Spanning Tree Global Settings page. The possible field values are:
– Classic STP —Indicates that Classic STP is enabled on the device.
– Rapid STP —Indicates that Rapid STP is enabled on the device.
– Multiple STP —Indicates that Multiple STP is enabled on the device.