H3C Technologies H3C S5560 Series Switches - Manual (Page 124)

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On a spanning tree device, a port can have different priorities and play different roles in different
spanning trees. As a result, 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 recalculates 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.
• The stp point-to-point force-false or stp point-to-point force-true command configured on a port in
MSTP or PVST mode takes effect on all MSTIs or VLANs.
• 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.