Command Manual (For Soliton) – MSTP
H3C S3100 Series Ethernet Switches
Chapter 1 MSTP Configuration Commands
1-21
Parameters
instance-id
: ID of an MSTI ranging from 0 to 16. The value of 0 refers to the CIST.
cost
: Path cost to be set for the port. The range of the
cost
argument varies with the
standard used for calculating the default path cost of a port as follows:
z
With the IEEE 802.1D-1998 standard selected, the path cost of an Ethernet port
ranges from 1 to 65535.
z
With the IEEE 802.1t standard selected, the path cost of an Ethernet port ranges
from 1 to 200000000.
z
With the proprietary standard selected, the path cost of an Ethernet port ranges
from 1 to 200000.
Description
Use the
stp cost
command to set the path cost of the current port in a specified MSTI.
Use the
undo stp cost
command to restore the default path cost of the current port in
the specified MSTI.
By default, a switch automatically calculates the path costs of a port in different MSTIs
based on a specified standard.
If you specify the
instance-id
argument to be 0 or do not specify this argument, the
stp
cost
command sets the path cost of the port in CIST.
The path cost of a port affects its port role. By configuring different path costs for the
same port in different MSTIs, you can make flows of different VLANs travel along
different physical links, so as to achieve VLAN-based load balancing. Changing the
path cost of a port in an MSTI may change the role of the port in the instance and put it
in state transition.
Related commands:
stp interface cost
.
Examples
# Set the path cost of Ethernet 1/0/3 in MSTI 2 to 200.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet 1/0/3
[Sysname-Ethernet1/0/3] stp instance 2 cost 200
1.1.19 stp dot1d-trap
Syntax
stp dot1d-
[
instance instance-id
]
trap
[
newroot
|
topologychange
]
enable
undo stp
[
instance instance-id
]
dot1d-trap
[
newroot
|
topologychange
]
enable
