set protocols spanning-tree mstp max-hops
The set protocols spanning-tree mstp max-hops command sets the maximum hops of a spanning tree when MSTP is running.
Command Syntax
set protocols spanning-tree mstp max-hops <max-hops>
Parameter
Parameter | Description |
max-hops <max-hops> | Specifies the maximum hops of a spanning tree. The value is an integer that ranges from 6 to 40. The default value is 20. |
Usage Guidelines
The maximum number of hops of a spanning tree in an MST region determines the network scale.
An MST BPDU has a field that indicates the number of remaining hops:
- The number of remaining hops in a BPDU sent by the root switching device equals the maximum number of hops.
- The number of remaining hops in a BPDU sent by a non-root switching device equals the maximum number of hops minus the number of hops from the non-root switching device to the root switching device.
- If a switching device receives a BPDU in which the number of remaining hops is 0, the switching device will discard the BPDU.
Example
- Set the maximum hops of a spanning tree to 15 when MSTP is running.
admin@Xorplus# set protocols spanning-tree mstp max-hops 15 admin@Xorplus# commit
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