3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuration Task List 107
■ Between two MST regions, the packet is forwarded along the CST.
Implementation of MSTP on devices
MSTP is compatible with STP and RSTP. STP and RSTP protocol packets can be
recognized by devices running MSTP and used for spanning tree computing.
In addition to basic MSTP functions, many management-facilitating special
functions are provided, as follows:
■ Root bridge hold
■ Root bridge backup
■ Root guard
■ BPDU guard
■ Loop guard
■ Support for hot swapping of interface cards and active/standby changeover.
Protocols and Standards MSTP is documented in:
■ IEEE 802.1D: Spanning Tree Protocol
■ IEEE 802.1w: Rapid Spanning Tree Protocol
■ IEEE 802.1s: Multiple Spanning Tree Protocol
Configuration Task
List
Before configuration, you need to know the position of each device in each MST
instance: root bridge or leave node. In each instance, one, and only one device
acts as the root bridge, while all others as leaf nodes.