Dell 3548 manual Defining Rapid Spanning Tree, Defining STP LAG Settings Using CLI Commands

Defining STP LAG Settings Using CLI Commands

The following table contains the CLI commands for defining STP LAG settings. Table 7-21. STP LAG Settings CLI Commands

CLI Command	Description
spanning-tree	Enables spanning tree.
spanning-tree disable	Disables spanning tree on a specific LAG.
spanning-tree cost cost	Configures the spanning tree cost contribution of a
	LAG.
spanning-tree guard root	Enables root guard on all spanning tree instances on the
	interface.
spanning-tree port-priority priority	Configures port priority.
show spanning-tree [ethernet interface	Displays spanning tree configuration.
port-channel port-channel-number][instance
instance-id]
show spanning-tree [detail] [active blockedports]	Displays detailed spanning tree information on active or
[instance instance-id]	blocked ports.

The following is an example of the CLI commands:

console(config)# interface port-channel 1 console(config-if)# spanning-tree disable console(config-if)# spanning-tree cost 35000 console(config-if)# spanning-tree port-priority 96 console(config-if)# spanning-tree portfast

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.

Configuring Switch Information

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