D V S M a n a g e d I n d u s t r i a l R a c k Mo u n t E t h e r n e t S wi t c h U s e r Ma n u a l
3 - 4 2
But STP/RSTP can not support more VLANs in your network topology. If there are 2 VLANs between 2 bridges,
one path is blocked when STP/RSTP is enabled. So IEEE defined an extension to RSTP to further develop the
usefulness of VLANs.
Multiple Spanning Tree Protocol (MSTP) is an extension protocol of RSTP. It can provide an independent
spanning tree for different VLANs. MSTP builds a separate Multiple Spanning Tree (MST) for each instance.
And MST Region may include multiple MSTP instances. The operating theory is shown in the figure below.
Summary of Contents for DVS-328 series
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