1-15 
STP-related Standards 
STP-related standards include the following. 
z  IEEE 802.1D: spanning tree protocol 
z  IEEE 802.1w: rapid spanning tree protocol 
z  IEEE 802.1s: multiple spanning tree protocol 
Configuring Root Bridge 
Complete the following tasks to configure the root bridge: 
Task  Remarks 
Enabling MSTP 
Required 
To prevent network topology jitter caused by other 
related configurations, you are recommended to 
enable MSTP after other related configurations are 
performed. 
Configuring an MST Region  Required 
Specifying the Current Switch as a Root 
Bridge/Secondary Root Bridge
 
Required 
Configuring the Bridge Priority of the Current 
Switch
 
Optional 
The priority of a switch cannot be changed after the 
switch is specified as the root bridge or a 
secondary root bridge. 
Configuring How a Port Recognizes and 
Sends MSTP Packets
 
Optional 
Configuring the MSTP Operation Mode  Optional 
Configuring the Maximum Hop Count of an 
MST Region
 
Optional 
Configuring the Network Diameter of the 
Switched Network
 
Optional 
The default value is recommended. 
Configuring the MSTP Time-related 
Parameters
 
Optional 
The default values are recommended. 
Configuring the Timeout Time Factor  Optional 
Configuring the Maximum Transmitting Rate 
on the Current Port
 
Optional 
The default value is recommended. 
Configuring the Current Port as an Edge Port  Optional 
Specifying Whether the Link Connected to a 
Port Is Point-to-point Link
 
Optional