S e n d c o m m e n t s t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
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Cisco Nexus 5000 Series Command Reference
OL-16599-01
Chapter 2 Ethernet Commands
spanning-tree mst cost
spanning-tree mst cost
To set the path-cost parameter for any Multiple Spanning Tree (MST) instance (including the common and
internal spanning tree [CIST] with instance ID 0) use the
spanning-tree mst cost
command. To return to
the default settings, use the
no
form of this command.
spanning-tree mst
instance-id
cost
{
cost
|
auto
}
no spanning-tree mst
instance-id
cost
Syntax Description
Command Default
Automatically set port cost values:
•
10 Mbps—2,000,000
•
100 Mbps—200,000
•
1-Gigabit Ethernet—20,000
•
10-Gigabit Ethernet—2,000
Command Modes
Interface configuration mode
Command History
Usage Guidelines
The port cost depends on the port speed; the faster interface speeds indicate smaller costs. MST always
uses long path costs.
Higher cost values indicate higher costs. When entering the cost, do not include a comma in the entry;
for example, enter 1000, not 1,000.
The EtherChannel bundle is considered a single port. The port cost is the aggregation of all the
configured port costs assigned to that channel.
Examples
This example shows how to set the interface path cost:
switch(config-if)#
spanning-tree mst 0 cost 17031970
instance-id
Instance ID number; the range of valid values is from 0 to 4094.
cost
Port cost for an instance; the range of valid values is from 1 to 200,000,000.
auto
Sets the value of the port cost by the media speed of the interface.
Release
Modification
4.0(0)N1(1a)
This command was introduced.
