Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 984
Enabling Spanning Tree Protocol Globally
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www.dell.com | support.dell.com 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: Step Task 1 Enter the PROTOCOL SPANNING TREE mode. 2 Enable Spanning Tree. Command Syntax protocol spanning-tree 0 no disable Command Mode CONFIGURATION PROTOCOL SPANNING TREE Note: To disable STP globally for all Layer 2 interfaces, enter the disable command from PROTOCOL SPANNING TREE mode. Verify that Spanning Tree is enabled using the show config command from PROTOCOL SPANNING TREE mode. FTOS(conf)#protocol spanning-tree 0 FTOS(config-span)#show config ! protocol spanning-tree 0 no disable FTOS# 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. Figure 55-2. Spanning Tree Enabled Globally root R1 R2 1/3 Forwarding 2/1 1/4 Blocking 2/2 1/1 1/2 2/3 2/4 3/1 3/2 3/3 3/4 R3 Port 290 (GigabitEthernet 2/4) is Blocking Port path cost 4, Port priority 8, Port Identifier 8.290 Designated root has priority 32768, address 0001.e80d.2462 Designated bridge has priority 32768, address 0001.e80d.2462 Designated port id is 8.497, designated path cost 0 Timers: message age 1, forward delay 0, hold 0 Number of transitions to forwarding state 1 BPDU: sent 21, received 486 The port is not in the portfast mode 984 | Spanning Tree Protocol
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