Port Priority Configuration - Huawei Quidway S3900 Series Operation Manual

Operation Manual – MSTP
Quidway S3900 Series Ethernet Switches-Release 1510
[Quidway-Ethernet1/0/1] undo stp instance 1 cost
[Quidway-Ethernet1/0/1] quit
[Quidway] stp pathcost-standard dot1d-1998

1.3.8 Port Priority Configuration

Port priority is an important criterion on determining the root port. In the same condition,
ports with smaller port priority values are more potential to become the root port than
those with bigger priority values.
A port on a MSTP-enabled switch can have different port priorities and play different
roles in different spanning tree instances. This enables packets of different VLANs to be
forwarded along different physical paths, so that load balancing can be achieved by
VLANs.
You can configure port priority in the following two ways.
I. Configuring port priority in system view
Table 1-26 Configure port priority for specified ports in system view
Operation
Enter system view
Configure port priority
for specified ports
II. Configuring port priority in Ethernet port view
Table 1-27 Configure port priority for a specified port in Ethernet port view
Operation
Enter system view
Enter
view
Configure port priority
for the port
Changing port priority of a port may change the role of the port and put the port into
state transition.
A smaller port priority value indicates a higher possibility for the port to become the root
port. If all the ports of a switch have the same port priority value, the port priorities are
determined by the port indexes. Changing the priority of a port will cause spanning tree
regeneration.
system-view
stp interface interface-list
instance instance-id port
priority priority
system-view
Ethernet port
interface
interface-number
stp [ instance instance-id ]
port priority priority
Huawei Technologies Proprietary
Command
Command
interface-type
1-30
Chapter 1 MSTP Configuration
Description
—
Required
The default port priority is
128.
Description
—
—
Required.
The default port priority is
128.