Dell PowerConnect 54 Series, User Manual

Page: 287 / 416

Configuring Device Information
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RSTP has the following different port states:
• Disabled
• Learning
• Discarding
• Forwarding
Rapid Spanning Tree is enabled on the STP Global Settings page. To open the Rapid Spanning Tree
(RSTP) page, click Switch
→
Spanning Tree
→
Rapid Spanning Tree in the tree view.
Figure 7-35. Rapid Spanning Tree (RSTP)
• Interface — Port or LAG on which Rapid STP is enabled.
• Role — 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 — 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. Backup ports also occur when a
LAN has two or more connections connected to a shared segment.
– Disabled — The port is not participating in the Spanning Tree (the port’s link is down).