In the same LAB App I applied BABEL configuration on 4 FRR Node. 
When I ping to other end of the network. But packets cannot sent to destination.
When I delete and then add default route of DEBIAN after that ping become successful.
I have to do this frequently. (When ping unsuccessful FRR learn destination address from BABEL after adding the default route ping successful) 
Why could it be.


> 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.

Inan