Technical Tip: Explaining HA sync error 'send() failed: 14(Bad address)'

[sahmed_FTNT]

Description	This article describes the HA sync error captured during the HA sync issue.
Scope	FortiGate.
Solution	During HA random disconnects, below error is observed: <hasync:WARN> conn=0x10e812b0 send() failed: 14(Bad address). conn->dst=169.254.0.2 Verify the following settings: The destination unit is receiving the HA traffic. If there is a switch/Router in between, make sure Multicast traffic is allowed. Verify that all remote devices in HA have valid HA interface IPs. If HA devices are geographically located in distant locations, make sure all devices between them allow multicast traffic. Unicast can be used as well if Multicast traffic is getting blocked or dropped between devices: config system ha     set hbdev port1 50     set unicast-hb enable     set unicast-hb-peerip 10.10.10.1 end HA SYNC debug logs can be collected with the following commands: diagnose debug enable diagnose debug console timestamp enable diagnose debug application hasync -1    diagnose debug enable diagnose debug disable <----- To stop the debug output. Related article: Unicast HA heartbeat