I've a Firewall setup with HA pair configured. In which i enabled VLAN tagging for the LAN interface. Used DGS-3120-24TC switch in which confiured the VLAN and tagged the correspoding ports. HA pair (Active -Standby) works well with this setup. But if i replaced the switch with DGS-1210-48 (Firmware version 2.01.002) and do the failover both units getting flipflop which means both unit become Active so that i'm not able to access the firewall from the LAN. Is there any solution to solve this issue? Also i want to know that is there any difference between the DGS-3120-24TC (Xstack) and DGS-1210-48 (web smart switch)? Is there any bug with this firmware version?