H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 75)

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Configuration example
# In MSTP mode, specify the device to calculate the default path costs of its ports by using IEEE
802.1d-1998.
system-view
[Sysname] stp pathcost-standard dot1d-1998
# Set the path cost of GigabitEthernet 1/0/3 to 200 on MSTI 2.
[Sysname] interface gigabitethernet 1/0/3
[Sysname-GigabitEthernet1/0/3] stp instance 2 cost 200
Configuring the port priority
The priority of a port is an important factor in determining whether the port can be elected as the root
port of a device. If all other conditions are the same, the port with the highest priority will be elected as
the root port.
On a spanning tree device, a port can have different priorities and play different roles in different
spanning trees, so that data of different VLANs can be propagated along different physical paths,
implementing per-VLAN load balancing. You can set port priority values based on the actual networking
requirements.
Follow these steps to configure the priority of a port or a group of ports:
To do... Use the command... Remarks
Enter system view system-view —
Enter interface view or port
group view
Enter Ethernet interface view or Layer 2
aggregate interface view
interface interface-type interface-number
Enter port group view
port-group manual port-group-name
Required
Use either command.
Configure the port priority
stp [ instance instance-id ] port priority
priority Required
128 for all ports by default.
NOTE:
•
If the port priority changes, the system re-calculates the port role and initiate a state transition.
• A lower priority value means a higher priority. If all ports of a device are of the same priority, a smaller
port number is preferred. Modifying the priority of a port triggers a new spanning tree calculation.
Configuring the port link type
A point-to-point link directly connects two devices. If two root ports or designated ports are connected
over a point-to-point link, they can rapidly transition to the forwarding state after a proposal-agreement
handshake process.
Follow these steps to configure the link type of a port or a group of ports:
To do... Use the command... Remarks
Enter system view system-view —