You can add, edit and remove port members of each trunk and then press "Apply" button after you have finished configuring the trunks you need.

(Note: Make sure trunking ports are in the same VLAN group. )

4.8 STP

Spanning tree is a link management protocol that provides path redundancy while preventing undesirable loops in the network. For Layer 2 Ethernet network to function properly, only one active path must exist between two stations.

The spanning-tree algorithm calculates the best loop-free path throughout a switched network. STP forces redundant data paths into a standby (blocked) state. If a network segment in the spanning tree fails and a redundant path exists, the spanning-tree algorithm recalculates the spanning tree topology and activates the standby path.

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