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Spanning-Tree Instance Interface
STP and RSTP are limited to a single instance on any physical interface. Use the interface statement to configure which interfaces participate in the STP or RSTP instance.
MSTP supports multiple instances on a single physical interface. Use the interface statement to configure which logical interfaces participate in MSTP.
For VSTP, interfaces can be configured at the global level or at the VLAN level. Interfaces configured at the global VSTP level will be enabled for all the configured VLANs. If an interface is configured at both the global and VLAN levels, the configuration at the VLAN level overrides the global configuration.
