etsysMstpMstIdOfFdb 1.3.6.1.4.1.5624.1.2.28.1.1.5.1.2

The ID of the Spanning Tree instance to which the corresponding FID is mapped. This ID must either be 0 (i.e., the CIST) or be a value which is present in the MSTI Table (etsysMstpMstiTable).