39
{ In PVST mode:
stp vlan vlan-id-list cost cost-value
{ In MSTP mode:
stp [ instance instance-list ] cost cost-value
By default, the system automatically calculates the path cost of each port.
Configuring the port priority
About port priority
The priority of a port is a factor that determines 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 is elected as the root
port.
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.
Restrictions and guidelines
When the priority of a port changes, the system recalculates the port role and initiates a state
transition. Prepare for the network topology change before configuring the port priority.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
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
About 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.
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. As a best practice, use the default setting and let the device
automatically detect the port link type.
To Next Page
Loading...
Need help?
General