I installed FRR on debian 9 on 4 VM. I have 4 node FRR. All of them have eigrp configuration.When I start ping test to 2 hop away FRR Router.  Ping test successful.But when I shutdown the interface of 2 hop away FRR Router.Ping packets drop down.With no shut comand in destination interface.Ping successful again. But sometimes eigrpd daemon kill itself on FRR and I can not pinging again. I have to restart frr service on VM. But normally it should not work like that. Why this happen it in this scenario.I have to deliver packets to destination continuously.Please help!