H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – MSTP
H3C S7500E Series Ethernet Switches Chapter 1 MSTP Configuration
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 Note:
z When the priority of a port is changed, MSTP will re-calculate the role of the port and
initiate a state transition.
z Generally, a lower configured value priority indicates a higher priority of the port. If
you configure the same priority value for all the Ethernet ports on a device, the
specific priority of a port depends on the index number of that port. Changing the
priority of an Ethernet port triggers a new spanning tree calculation process.
II. Configuration example
# Set the priority of port GigabitEthernet 2/0/1 to 16 in MST instance 1.
<Sysname> system-view
[Sysname] interface GigabitEthernet 2/0/1
[Sysname-GigabitEthernet2/0/1] stp instance 1 port priority 16
1.4.8 Configuring Whether Ports Connect to Point-to-Point Links
Refer to Configuring Whether Ports Connect to Point-to-Point Links in the section about
root bridge configuration.
1.4.9 Configuring the Mode a Port Uses to Recognize/Send MSTP Packets
Refer to Configuring the Mode a Port Uses to Recognize/Send MSTP Packets in the
section about root bridge configuration.
1.4.10 Enabling Output of Port State Transition Information
Refer to Enabling the Output of Port State Transition Information in the section about
root bridge configuration.
1.4.11 Enabling the MSTP Feature
Refer to Enabling the MSTP Feature in the section about root bridge configuration.
1.5 Performing mCheck
Ports on an MSTP-compliant device have three working modes: STP compatible mode,
RSTP mode, and MSTP mode.
In a switched network, if a port on the device running MSTP (or RSTP) connects to a
device running STP, this port will automatically migrate to the STP-compatible mode.
However, if the device running STP is removed, this will not be able to migrate
automatically to the MSTP (or RSTP) mode, but will remain working in the