Dell PowerConnect 3424 User's Guide (.htm) - Page 288
Defining Rapid Spanning Tree, Switch, Spanning Tree, Rapid Spanning Tree, Interface, Designated
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www.dell.com | support.dell.com Defining Rapid Spanning Tree While the classic spanning tree prevents Layer 2 forwarding loops on a general network topology, convergence can take 30-60 seconds. The delay allows time to detect possible loops, and propagate status changes. Rapid Spanning Tree Protocol (RSTP) detects and uses network topologies that allow a faster convergence of the spanning tree, without creating forwarding loops. To open the Rapid Spanning Tree (RSTP) settings page, click Switch→Spanning Tree→Rapid Spanning Tree in the tree view. Figure 7-25. Rapid Spanning Tree (RSTP) settings 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. 288 Configuring Switch Information
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