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FortiSwitch-5003A and 5003 Fabric and Base Backplane Communications Guide
98 01-30000-85717-20081205
config FortiSwitch-5003A CLI reference
switch fabric-channel stp instance
Use this command to add and configure 802.1s Multi-Spanning Tree Protocol (MSTP) spanning tree
instances. A spanning tree instance consists of the following:
• An instance ID
• A priority value
• A VLAN range
• A cost and priority value for each FortiSwitch-5003A interface (configured with the
config stp-port command).
Syntax
config switch fabric-channel stp instance
edit <instance_id>
set priority <priority_value>
set vlan-range <id_numbers>
config stp-port
edit <interface_name>
set cost <cost_int>
set priority <priority_value>
end
end
Variables Description Default
edit <instance_id> Enter a numeric spanning tree instance number in the range 0
to 15. All devices participating in an MSTP region must have
the same spanning tree instances.
The default configuration includes spanning tree instance 0 that
has a <priority_value> of 32768 and does not include a
vlan-range setting. The stp-port configuration of spanning
tree instance 0 sets the cost of all FortiSwitch-5003A interfaces
to 0 and the priority of all interfaces to 128.
priority <priority_value> The priority value of the FortiSwitch-5003A spanning tree
instance.
MSTP regions include multiple devices with the same spanning
tree instances. The different priority values of the same
instances on different devices determines how spanning tree
routes packets to the different devices. The device with the
spanning tree instance with the lowest priority value is more
likely to be the root device and to process all packets.
The <priority_value> range is 0 to 61440 in increments of
4096. Valid priority values are: 0, 4096, 8192, 12288, 16384,
20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,
53248, 57344, and 61440.
32768
vlan-range <id_numbers> Specify the IEEE 802.1Q VLAN IDs that can be added to
VLAN-tagged packets that this spanning tree instance can
receive and transmit. Only packets with these VLAN IDs are
affected by this spanning tree instance.
You can enter any combination of single VLAN IDs and ranges
of VLAN IDs. Use a hyphen to specify ranges. Separate each
single ID or range with a comma. Do not include spaces. For
example: 1,3-4,6,7,9-100.
No default.