Chapter 45: Multiple Spanning Tree Protocol
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VLAN and MSTI Associations
Part of the task to configuring MSTP involves assigning VLANs to
spanning tree instances. The mapping of VLANs to MSTIs is called
associations. A VLAN, either port-based or tagged, can belong to only one
instance at a time, but an instance can contain any number of VLANs.