Dell PowerConnect 2808 User Manual page 123

Figure 7-19. 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).
• Mode — Displays the STP mode by which STP is enabled on the device. The possible field values are:
– Classic STP — Enables Classic STP on the device. This is the default value.
Rapid STP — Enables Rapid STP on the device.
–
• Fast Link Operational Status — Indicates if Fast Link is enabled or disabled for the port or LAG. If
Fast Link is enabled for a port, the port is automatically placed in the forwarding state.
Enabling RSTP
1 Open the Rapid Spanning Tree (RSTP) page.
2 Define the Point-to-Point Admin, Point-to-Point Oper, and the Activate Protocol Migration fields.
Dell PowerConnect 28xx Systems User Guide
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