Netgear XCM8806 Chassis User Manual - Page 559

NETGEAR 8800 User Manual = boundary port = master port = MSTI root port (10) CIST root bridge A C B (20) CIST regional root D MSTP Region 1 E I F (50) MSTI regional root (60) G (80) H (40) CIST regional root, MSTI regional root MSTP Region 2 J K (90) (100) EX_167 Figure 50. Sample MSTP Topology with Two MSTP Regions Configuring MSTP Region Identifiers For multiple switches to be part of an MSTP region, you must configure each switch in the region with the same MSTP configuration attributes, also known as MSTP region identifiers. The following list describes the MSTP region identifiers: • Region Name-This indicates the name of the MSTP region. In the NETGEAR implementation, the maximum length of the name is 32 characters and can be a combination of alphanumeric characters and underscores ( _ ). • Format Selector-This indicates a number to identify the format of MSTP BPDUs. The default is 0. • Revision Level-This identifier is reserved for future use; however, the switch uses and displays a default of 3. The switches inside a region exchange BPDUs that contain information for MSTIs. The switches connected outside of the region exchange CIST information. By having devices look at the region identifiers, MSTP discovers the logical boundary of a region: • Configuring the MSTP region name To configure the MSTP region name, use the following command: configure mstp region The maximum length of the region name is 32 characters and can be a combination of alphanumeric characters and underscores ( _ ). You can configure only one MSTP region on the switch at any given time. Chapter 18. STP | 559