Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 542

• Adding and Removing Interfaces • Creating Multiple Spanning Tree Instances • Influencing MSTP Root Selection • Interoperate with Non-Dell Bridges • Changing the Region Name or Revision • Modifying Global Parameters • Modifying the Interface Parameters • Configuring an EdgePort • Flush MAC Addresses after a Topology Change • MSTP Sample Configurations • Debugging and Verifying MSTP Configurations Spanning Tree Variations The Dell Networking OS supports four variations of spanning tree, as shown in the following table. Table 60. Spanning Tree Variations Dell Networking Term Spanning Tree Protocol (STP) Rapid Spanning Tree Protocol (RSTP) Multiple Spanning Tree Protocol (MSTP) Per-VLAN Spanning Tree Plus (PVST+) IEEE Specification 802 .1d 802 .1w 802 .1s Third Party Implementation Information MSTP is implemented as follows in Dell Networking OS: • The Dell Networking OS MSTP implementation is based on IEEE 802.1Q-2003 and interoperates only with bridges that also use this standard implementation. • MSTP is compatible with STP and RSTP. • Dell Networking OS supports only one MSTP region. • When you enable MSTP, all ports in Layer 2 mode participate in MSTP. • You can configure 64 MSTIs including the default instance 0 (CIST). Configure Multiple Spanning Tree Protocol Configuring multiple spanning tree is a four-step process. 1 Configure interfaces for Layer 2. 2 Place the interfaces in VLANs. 3 Enable the multiple spanning tree protocol. 4 Create multiple spanning tree instances and map VLANs to them. Related Configuration Tasks The following are the related configuration tasks for MSTP. • Creating Multiple Spanning Tree Instances 542 Multiple Spanning Tree Protocol (MSTP)