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DELL S50V User Manual

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Spanning Tree Protocol
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Enabling Spanning Tree Protocol Globally
Spanning Tree Protocol must be enabled globally; it is not enabled by default.
To enable Spanning Tree globally for all Layer 2 interfaces:
Verify that Spanning Tree is enabled using the 
show config 
command from PROTOCOL SPANNING 
TREE mode.
Figure 52-3.  Verifying STP is Enabled
When you enable Spanning Tree, all physical, VLAN, and port-channel interfaces that are enabled and in 
Layer 2 mode are automatically part of the Spanning Tree topology.
•
Only one path from any bridge to any other bridge participating in STP is enabled.
•
Bridges block a redundant path by disabling one of the link ports.
Step
Task
Command Syntax
Command Mode
1
Enter the PROTOCOL SPANNING TREE mode.
protocol spanning-tree 0
CONFIGURATION
2
Enable Spanning Tree.
no disable
PROTOCOL 
SPANNING TREE
Note: To disable STP globally for all Layer 2 interfaces, enter the 
disable
 command from PROTOCOL 
SPANNING TREE mode.
FTOS(conf)#protocol spanning-tree 0
FTOS(config-span)#show config
!
protocol spanning-tree 0 
 no disable
FTOS#
Indicates that Spanning Tree is enabled