MSTP configuration using EDM

This chapter describes how you can configure Multiple Spanning Tree Protocol (MSTP) using Enterprise Device Manager (EDM).

With MSTP (or IEEE 802.1s), you can configure multiple instances of RSTP on the same switch. Each MSTP instance can include one or more VLANs. The operation of the MSTP is similar to the current Nortel proprietary STG.

In the MSTP mode, the 4500 Series switches support a maximum of one Common and Internal Spanning Tree (CIST) and seven Multiple Spanning Tree Instances (MSTI).

Within the CIST, the Internal Spanning Tree component is used only by devices from the same region (for which a regional root is elected). The Common (External) Spanning Tree component of the CIST is used by devices from different regions or between devices with different STP modes.