154 CHAPTER 14: MSTP CONFIGURATION
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In a network containing switches with both GVRP and MSTP enabled, GVRP
packets are forwarded along the CIST. If you want to advertise packets of a specific
VLAN through GVRP, be sure to map the VLAN to the CIST when configuring the
MSTP VLAN mapping table (the CIST of a network is spanning tree instance 0).
Configuration
Prerequisites
The role (root, branch, or leaf) of each switch in each spanning tree instance is
determined.
Tabl e 101 Configure a root bridge
Operation Description Related section
Enable MSTP Required
To prevent network topology
jitter caused by other related
configurations, you are
recommended to enable
MSTP after other related
configurations are performed.
“Enabling MSTP”
Configure an MST region Required “Configuring an MST Region”
Specify the current switch as a
root bridge/secondary root
bridge
Required “Specifying the Current
Switch as a Root
Bridge/Secondary Root
Bridge”
Configure 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 the Bridge
Priority of the Current Switch”
Configure the mode a port
recognizes and sends MSTP
packets
Optional “Configuring the Mode a Port
Recognizes and Sends MSTP
Packets”
Configure the MSTP
operation mode
Optional “Configuring the MSTP
Operation Mode”
Configure the maximum hop
count of an MST region
Optional “Configuring the Maximum
Hop Count of an MST
Region”
Configure the network
diameter of the switched
network
Optional
The default value is
recommended.
“Configuring the Network
Diameter of the Switched
Network”
Configure the MSTP
time-related parameters
Optional
The default values are
recommended.
“Configuring the MSTP
Time-related Parameters”
Configure the timeout time
factor
Optional “Configuring the Timeout
Time Factor”
Configure the maximum
transmitting speed of the port
Optional
The default value is
recommended.
“Configuring the Maximum
Transmitting Speed on the
Current Port”
Configure the current port as
an edge port
Optional “Configuring the Current Port
as an Edge Port”
Specify whether the link
connected to a port is a
point-to-point link
Optional “Specifying Whether the Link
Connected to a Port Is
Point-to-point Link”
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