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| Sun Ethernet Fabric Operating System ### STP Administration Guide

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#### MSTP Configuration Guidelines

MSTP configuration guidelines are as follows:

- The switch supports up to 16 MST instances. The number of VLANs that can be mapped to a particular MST instance is 1024. SEFOS MSTP software can support 64 MSTI instances and each instance can be mapped to 4094 VLANs.

- In a spanning tree network, the switches can be in the same MST region only when they have the same VLAN-to-instance map, configuration revision number, and name.

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