Netgear XCM8806 Chassis Hardware Installation Guide - Page 748

NETGEAR 8800 Chassis Switch CLI Manual MSTP STPDs use 802.1D BPDU encapsulation mode by default. To ensure correct operation of your MSTP STPDs, do not configure EMISTP or PVST+ encapsulation mode for MSTP STPDs. STPD Identifier An StpdID is used to identify each STP domain. You assign the StpdID when configuring the domain. An STPD ID must be identical to the VLAN ID of the carrier VLAN in that STPD and that VLAN cannot belong to another STPD. MSTP uses two different methods to identify the STPDs that are part of the MSTP network. An instance ID of 0 identifies the Common and Internal Spanning Tree (CIST). The switch assigns this ID automatically when you configure the CIST STPD. A multiple spanning tree instance identifier identifies each STP domain that is part of an MSTP region. You assign the MSTI ID when configuring the STPD that participates in the MSTP region. In an MSTP region, MSTI IDs only have local significance. You can reuse MSTI IDs across MSTP regions. Automatically Inheriting Ports-MSTP Only In an MSTP environment, whether you manually or automatically bind a port to an MSTI in an MSTP region, the switch automatically binds that port to the CIST. The CIST handles BPDU processing for itself and all of the MSTIs; therefore, the CIST must inherit ports from the MSTIs in order to transmit and receive BPDUs. Example Create a VLAN named marketing and an STPD named STPD1 as follows: create vlan marketing create stpd stpd1 The following command adds the VLAN named marketing to the STPD STPD1, and includes all the ports of the VLAN in STPD1: configure stpd stpd1 add vlan marketing ports all configure stpd default-encapsulation configure stpd default-encapsulation [dot1d | emistp | pvst-plus] Description Configures the default encapsulation mode for all ports added to the specified STPD. Syntax Description stpd_name dot1d emistp Specifies an STPD name on the switch. Specifies the STP encapsulation mode of operation to be 802.1d. Specifies the STP encapsulation mode of operation to be EMISTP. 748 | Chapter 17. STP Commands