Configuring Device Information 251
The following is an example of the CLI commands:
Configuring Rapid Spanning Tree
While Classic Spanning Tree guarantees preventing L2 forwarding loops in a general network
topology, convergence can take up to 30-60 seconds. The convergence time is considered too long
for many applications. When network topology allows, faster convergence may be possible. The
Rapid Spanning Tree Protocol (RSTP) detects and uses of network topologies that provide faster
convergence of the spanning tree, without creating forwarding loops.
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.
show spanning-tree [ ethernet interface
| port-channel port-channel-number]
Displays spanning tree configuration.
show spanning-tree [detail] [active |
blockedports]
Displays detailed spanning tree
information on active or blocked ports
console(config)# interface port-channel 1
console(config-if)# spanning-tree port-priority 16
Table 7-62. STP LAG Settings CLI Commands
CLI Command Description
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