Fortinet MR1 - Manual (Page 176)

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Syntax
spanning-tree max-hops <1-127>
no spanning-tree max-hops
<1-127> - the Maximum hops value (Range: 1-127).
no - This command sets the Bridge Max Hops parameter for the common and internal spanning tree to
the default value.
Default Setting
20
Command Mode
Global Config
5.4.2.9 spanning-tree mst
This command adds a multiple spanning tree instance to the switch. The instance <1-3965>
is a number within a range of 1 to 3965 that corresponds to the new instance ID to be added.
The maximum number of multiple instances supported is 4.
Syntax
spanning-tree mst instance <1-4094>
no spanning-tree mst instance <1-4094>
<1-4094> - multiple spanning tree instance ID.
no - This command removes a multiple spanning tree instance from the switch and reallocates all VLANs
allocated to the deleted instance to the common and internal spanning tree. The instance <1-4094> is a
number that corresponds to the desired existing multiple spanning tree instance to be removed.
Default Setting
None
Command Mode
Global Config