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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
BPDU drop
Protocols and standards
MSTP is documented in the following protocols and 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
MSTP configuration task list
Before configuring MSTP, you must plan the role of each device in each MSTI, root bridge or leaf node,
and then configure the devices as planned. In each MSTI, only one device acts as the root bridge, and all
others act as leaf nodes.
Complete these tasks to configure MSTP:
Configuring the root
bridge
Configuring an MST region
Configuring the root bridge or a secondary root bridge
Configuring the work mode of an MSTP device
Configuring the priority of a device
Configuring the maximum hops of an MST region
Configuring the network diameter of a switched network
Configuring timers of MSTP
Configuring the timeout factor
Configuring the maximum port rate
Configuring ports as edge ports
Configuring the link type of ports
Configuring the mode a port uses to recognize/send MSTP
packets
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