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The spanning tree protocol allows you to configure the STP parameters on network Ethernet interface. 

Spanning-Tree Protocol is a link management protocol that provides path redundancy while 
preventing undesirable loops in the network. For an Ethernet network to function properly, only one 
active path can exist between two stations. Multiple active paths between stations cause loops in the 
network. If a loop exists in the network topology, the potential exists for duplication of messages. 
When loops occur, some switches see stations appear on both sides of the switch. This condition 
confuses the forwarding algorithm and allows duplicate frames to be forwarded.   

To provide path redundancy, Spanning-Tree Protocol defines a tree that spans all switches in an 
extended network. Spanning-Tree Protocol forces certain redundant data paths into a standby (blocked) 
state. If one network segment in the Spanning-Tree Protocol becomes unreachable, or if 
Spanning-Tree Protocol costs change, the spanning-tree algorithm reconfigures the spanning-tree 
topology and reestablishes the link by activating the standby path. 

STP is a technology that allows bridges to communicate with each other to discover physical loops in 
the network. The protocol then specifies an algorithm that bridges can use to create a loop-free logical 
topology. In other words, STP creates a tree structure of loop-free leaves and branches that spans the 
entire Layer 2 network. 

 

 

 
 
 
Table 4-15 describes the spanning tree parameters field items. 

System STP status   

Spanning Tree Protocol to be enabled on the Bridge or not. 

GbE Port STP status 

This specifies the STP status of Gigabit Ethernet interface.