61
Default level
2: System level
Parameters
instance
instance-id
: Sets the path cost of the ports in a particular MSTI. The
instance-id
argument ranges
from 0 to 15, where 0 represents the CIST.
cost
: Specifies the path cost of the port, with an effective range that depends on the path cost calculation
standard used.
•
With the IEEE 802.1d-1998 standard selected for path cost calculation, the
cost
argument ranges
from 1 to 65535.
•
With the IEEE 802.1t standard selected for path cost calculation, the
cost
argument ranges from 1
to 200000000.
•
With the private standard selected for path cost calculation, the
cost
argument ranges from 1 to
200000.
Description
Use
stp cost
to set the path cost of the port or ports.
Use
undo stp cost
to restore the default.
By default, the device automatically calculates the path costs of ports in each spanning tree based on the
corresponding standard.
To set the path cost of an MSTP port in a specific MSTI, use this command with the MSTI specified. To set
the path cost of an MSTP port in the CIST or an STP/RSTP port, use this command without specifying any
MSTI.
Path cost is an important factor in spanning tree calculation. Setting different path costs for a port in
MSTIs allows VLAN traffic flows to be forwarded along different physical links, achieving VLAN-based
load balancing.
The path cost setting of a port can affect the role selection of the port. When the path cost of a port is
changed, the system will re-calculate the role of the port and initiate a state transition.
Related commands:
display stp
and
stp pathcost-standard
.
Examples
# In MSTP mode, set the path cost of port GigabitEthernet 1/0/1 in MSTI 2 to 200.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp instance 2 cost 200
stp edged-port
Syntax
stp edged-port
{
enable
|
disable
}
undo stp
edged-port
View
Ethernet interface view, WLAN mesh interface view
