Enabling Spanning Tree Protocol Globally - Dell S6100 Configuration Manual

Example of the show config Command
To verify that an interface is in Layer 2 mode and enabled, use the show config command from INTERFACE mode.
Dell(conf-if-te-1/1/1/1)#show config
!
interface TenGigabitEthernet 1/1/1/1
no ip address
switchport
no shutdown
Dell(conf-if-te-1/1/1/1)#

Enabling Spanning Tree Protocol Globally

Enable the spanning tree protocol globally; it is not enabled by default.
When you enable STP, 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.
Figure 122. Spanning Tree Enabled Globally
To enable STP globally, use the following commands.
1 Enter PROTOCOL SPANNING TREE mode.
CONFIGURATION mode
protocol spanning-tree 0
2 Enable STP.
PROTOCOL SPANNING TREE mode
Spanning Tree Protocol (STP) 867