Two 2012 R2 servers can't "see" a share from each other

Hello,

We have a strange problem with 2012 R2 servers (located in the same VLAN, normally without restriction between them).

- Server A can see all the shares from server C, server C can see the shares from server A

- Server B can see all the shares from server C, server C can see the shares from server B

- Server CANNOT see the shares from server B, AND server B cannot see the shares from server A !

I have tried to access with the IP address, same sympton

Any idea or suggestion?

Thanks already to everybody.
Serge

Serge