Hello to all, Thanks for your answers. Well... after an awful night, I found the problem... It was a MTU mistake ! No relation with Ceph ! So sorry for the noise, and thanks again. Best Regards - Cordialement Alexis _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com