summarizes the new and changed features for the Cisco Nexus 7000 Series NX-OS Layer 2 Switching Command Reference, Release 4.0, and tells you where they are documented.
Table 1 New and Changed Information for Release 4.0
Feature
Change Description
Changed in Release
Multiple Spanning Tree (MST)
The spanning-tree mst pre-standard command was added. You can force interfaces to send prestandard MST BPDUs prior to receiving a prestandard MST BPDUs from another device.