R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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NOTE:
W
hen the path cost of a port chan
g
es, the system re-calculates the role of the port and initiates a state
transition.
3. Configuration example
# In MSTP mode, specify the device to calculate the default path costs of its ports by using IEEE
802.1d-1998, and set the path cost of GigabitEthernet 0/3 to 200 on MSTI 2.
<Sysname> system-view
[Sysname] stp pathcost-standard dot1d-1998
[Sysname] interface GigabitEthernet 0/3
[Sysname-GigabitEthernet0/3] stp instance 2 cost 200
Configuring the port priority
The priority of a port is an important factor in determining 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 will be elected as
the root port.
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.
Follow these steps to configure the priority of a port or a group of ports:
To do... Use the command...
Remarks
Enter system view system-view —
Enter interface view or
Layer 2 aggregate
interface view
interface interface-type interface-number —
Configure the port
priority(in STP/RSTP
mode)
stp port priority priority
Required
Use either command.
128 for all ports by default.
Configure the port
priority (in MSTP mode)
stp [ instance instance-id ] port
priority
priority
NOTE:
If the port priority changes, the system re-calculates the port role and initiate a state transition.
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 transition to the forwarding state after a proposal-agreement
handshake process.
Follow these steps to configure the link type of a port or a group of ports:
To do... Use the command...
Remarks
Enter system view system-view —
Enter interface view or
Layer 2 aggregate
interface view
interface interface-type interface-number —