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Fortigate HA & FortiSwitch MC-LAG stopped working
Two Fortigates with two distribution switches in MC-LAG and three sets of access switches in a ring configuration. See diagram. After upgrading all firmware from 6.2 to 6.4, redundancy stopped working. There seems to be a loop somewhere. If all redundancy links are plugged in, ping stops. If I remove redundancy link, pings continues. There are also two Fortiswitches connected to the WAN ports not in diagram. What could be the possible reason for this?
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