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FortiSwitch-5003A and 5003 Fabric and Base Backplane Communications Guide
62 01-30000-85717-20081205
Example active-passive redundant link configuration FortiGate-5050 fabric backplane communication
4 Add spanning tree instance 5 for packets from the external networks. Add VLAN
tags 101 to this spanning tree instance. Set the priority of this spanning tree
instance to 5, the same as instance 3.
spanning-tree instance 5 vlan 101
spanning-tree instance 5 priority 5
Example configuration for the FortiSwitch-5003A board in slot 1
The FortiSwitch-5003A board in slot 1 requires the following configuration
settings:
1 Disable communication between the FortiSwitch-5003A boards:
config switch fabric-channel physical-port
edit slot-2/1
set status down
end
2 Create an MSTP configuration that includes the same name and revision as was
added to the external switch. For example, if the name is tree_1 and the revision
is 1:
config switch fabric-channel stp settings
set name "tree_1"
set revision 1
end
3 Add two spanning tree instances numbered the same as the instances added to
the switch (3 and 5). Add the VLAN tags to the instances and set their priority
values to 4096:
config switch fabric-channel stp instance
edit 3
set priority 4096
set vlan-range 100
next
edit 5
set priority 4096
set vlan-range 101
end
4 Add a trunk named trunk_345 that aggregates backplane slots 3, 4, and 5:
config switch fabric-channel trunk
edit "trunk_345"
set members "slot-3" "slot-4" "slot-5"
end
5 Allow VLAN packets on the FortiSwitch-5003A F5 front panel interface and the
trunk:
config switch fabric-channel interface
edit "f5"
set allowed-vlans 1,100-101
next
edit "trunk_345"
set allowed-vlans 1,100-101
end
Note: The priority values of both spanning tree instances should be lower on the
FortiSwitch-5003A board in slot 1 than on the board in slot 2 so that MSTP directs all traffic
to the board in slot 1.