H3C Technologies H3C S10500 Series Switches - Manual (Page 84)

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Implementation of MSTP on devices
MSTP is compatible with STP and RSTP. Devices that are running MSTP and that are used for spanning
tree calculation can identify STP and RSTP protocol packets.
In addition to basic MSTP functions, the following functions are provided for ease of management:
• Root bridge hold
• Root bridge backup
• Root guard
• BPDU guard
• Loop guard
• TC-BPDU guard
• Support for hot swapping of interface cards and active/standby changeover.
Protocols and standards
The spanning tree protocols are documented in the following standards:
• IEEE 802.1d, Media Access Control (MAC) Bridges
• IEEE 802.1w, Part 3: Media Access Control (MAC) Bridges—Amendment 2: Rapid Reconfiguration
• IEEE 802.1s, Virtual Bridged Local Area Networks—Amendment 3: Multiple Spanning Trees
Spanning tree configuration task list
Before configuring a spanning tree, you must determine the spanning tree protocol to be used (STP, RSTP,
PVST, or MSTP) and plan the device roles (the root bridge or leaf node).
Complete the following tasks to configure STP:
Task Remarks
Setting the spanning tree mode
Required
Configure the device to work
in STP-compatible mode.
Configuring the root bridge or a secondary root bridge Optional
Configuring the device priority Optional
Configuring the network diameter of a switched network Optional
Configuring spanning tree timers Optional
Configuring the timeout factor Optional
Configuring the maximum port rate Optional
Configuring the mode a port uses to recognize/send MSTP
packets
Optional
Enabling the output of port state transition information Optional
Configuring the
root bridge
Enabling the spanning tree feature Required