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One of our Cisco 9300L switches keeps showing this error:%PM-4-ERR_DISABLE: loopback error detected on Gi2/0/5, putting Gi2/0/5 in err-disable state%PLATFORM_PM-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet2/0/5This port is our WAN Inte...
STP is disabled , do i need to enable it?I disabled auto-recovery of err-disable to monitor ports when it will down again.The switch connected to Fortigate firewall , firewall configured with VPN Site-to sites IPSecWhat else i can do?Thanks