Configuring The Port Link Type; Configuration Restrictions And Guidelines; Configuration Procedure - HP FlexFabric 12900 Series Configuration Manual

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
1. Enter system view.
2. Enter Layer 2 Ethernet or
aggregate interface view.
3. Configure the port priority.

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. HP 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
1. Enter system view.
2. Enter Layer 2 Ethernet or
aggregate interface view.
3. Configure the port link type.
Command
system-view
interface interface-type interface-number
•
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
Command
system-view
interface interface-type
interface-number
stp point-to-point { auto | force-false
| force-true }
96
Remarks
N/A
N/A
The default setting is 128
for all ports.
Remarks
N/A
N/A
By default, the link type is auto
where the port automatically
detects the link type.