Spanning Tree Protocol
Settings Guidelines
ID Instance ID. Range is 1 - 15.
Priority
Priority is a component of bridge ID. The switch with the lowest bridge ID
becomes the root switch for this MST instance.
Allowed values: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344, and 61440
Default value is 32768
VLANRange The VLANs that map to this MST instance. You can specify individual
VLANnumbers, or a range of numbers.
Note: do not assign any VLANto more than one MSTinstance.
Each VLANnumber is in the range 1-4094
Port Configuration
Name Port that will participate in this MSTinstance.
Cost
The switch uses port cost to select designated ports. Port cost is added to
the received PBDUroot cost in any BPDU sent on this port.
A lower value is preferred. The range of values is 1 to 200,000,000.
Default value depends on the interface speed:
- 10 Gigabit Ethernet: 2,000
- Gigabit Ethernet: 20,000
- Fast Ethernet: 200,000
- Ethernet: 2,000,000
Priority The switch uses port priority to choose among ports of the same cost. The
port with the lowest priority is put into forwarding state. The valid values
are: 0, 32, 64, 96, 128, 160, 192, and 224.
Default value : 128
Using the CLI:
config switch stp instance
edit <instance number>
set priority <>
config stp-port
set cost <>
set priority <>
next
set vlan-range <vlan range>
end
24 FortiSwitchOS-3.2.0
