108
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.
When the priority of a port changes, the system re-calculates the port role and initiates a state transition.
To configure the priority of a port:
Step Command Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet or
aggregate interface view.
interface
interface-type interface-number
N/A
3.
Configure the port priority.
•
In STP/RSTP mode:
stp port priority
priority
•
In PVST mode:
stp
vlan
vlan-id-list
port priority
priority
•
In MSTP mode:
stp
[
instance
instance-list
]
port priority
priority
The default setting is 128
for all ports.
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 transit to the forwarding state after a proposal-agreement
handshake process.
Configuration restrictions and guidelines
•
You can configure the link type as point-to-point for a Layer 2 aggregate interface or a port that
operates in full duplex mode. H3C recommends that you use the default setting and letting the
device automatically detect the port link type.
•
In PVST or MSTP mode, the
stp point-to-point force-false
or
stp point-to-point force-true
command
configured on a port takes effect on all VLANs or all MSTIs.
•
If you configure a non-point-to-point link as a point-to-point link, a temporary loop might occur.
Configuration procedure
To configure the link type of a port:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet or
aggregate interface view.
interface
interface-type
interface-number
N/A
3.
Configure the port link type.
stp point-to-point
{
auto
|
force-false
|
force-true
}
By default, the link type is
auto
where the port automatically
detects the link type.
