Spanning Tree Protocol (STP) Commands 45
2 Switching Commands
spanning-tree max-hops
This command sets the MSTP Max Hops parameter to a new value for the common and
internal spanning tree. The max-hops value is a range from 1 to 127.
Default 20
Format
spanning-tree max-hops <1-127>
Mode Global Config
no spanning-tree max-hops
This command sets the Bridge Max Hops parameter for the common and internal spanning
tree to the default value.
Format
no spanning-tree max-hops
Mode Global Config
spanning-tree mst
This command sets the Path Cost or Port Priority for this port within the multiple spanning tree
instance or in the common and internal spanning tree. If you specify an
<mstid> parameter
that corresponds to an existing multiple spanning tree instance, the configurations are done for
that multiple spanning tree instance. If you specify 0 (defined as the default CIST ID) as the
<mstid>, the configurations are done for the common and internal spanning tree instance.
If you specify the cost option, the command sets the path cost for this port within a multiple
spanning tree instance or the common and internal spanning tree instance, depending on the
<mstid> parameter. You can set the path cost as a number in the range of 1 to 200000000 or
auto. If you select auto the path cost value is set based on Link Speed.
If you specify the external-cost option, this command sets the external-path cost for MST
instance ‘0’ i.e. CIST instance. You can set the external cost as a number in the range of 1 to
200000000 or auto. If you specify auto, the external path cost value is set based on Link
Speed.
If you specify the port-priority option, this command sets the priority for this port within a
specific multiple spanning tree instance or the common and internal spanning tree instance,
depending on the
<mstid> parameter. The port-priority value is a number in the range of 0 to
240 in increments of 16.
Default cost—auto
external-cost—auto
port-priority—128
Format
spanning-tree mst <mstid> {{cost <1-200000000> | auto} |
{external-cost <1-200000000> | auto} | port-priority <0-240>}
Mode Interface Config
no spanning-tree mst
This command sets the Path Cost or Port Priority for this port within the multiple spanning tree
instance, or in the common and internal spanning tree to the respective default values. If you
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