As so many times I said there's a vlan issue you should not put all vps into one vlan or it will cause all vps crash by packets from others. You must split vlan or setup ovs virtual vlan to fix the issue. New nodes works fine because it only have few vps, once it incresed the packets will increse exponentially. Solusvm is shit however the unreachable isssue is not caused by its own bug but the connection dropped by slave node because so many packets it has to handle. Why you guys be so confidence thought the big vlan will work fine?