Application of MSTP Multi-process
As shown in Figure 1, the UPEs are connected to each other through Layer 2 links and enabled with Multiple Spanning Tree Protocol (MSTP). The rings connected to the UPEs must be independent of each other. The devices on the rings connected to the UPEs support only Rapid Spanning Tree Protocol (RSTP), not MSTP.
After MSTP multi-process is enabled, each MSTP process corresponds to a ring connected to the UPE. The spanning tree protocol on each ring calculates a tree independently.
