Multiple "Links" (routers) on the same network

Hello

 

 

my Link Controller : version 9.3.1.

 

 

my problem: when i create 3 links ( 3 operators routers) on the same subnet eg: 172.20.4.x, the status of the links are "down" for 2 of them .(even if i create 1 or 2, or 3 "links" , there is always 1 link up and 2 links down).

 

The monitor is bigip_link for all of them.

 

i ping all the routers.

 

I wonder if the problem comes from the fact that my routers are on the same subnet ? (i don't want to change that topology)

 

 

Could anyone help me ?

 

many thanks

 

 

David