The 16 bits reference counter limited the number of interfaces per FIB table to 65K from a given source. Some use cases, for example GTP-U tunnels require much more interfaces than that. This change increases the size of the reference counter to 32 bits. Type: fix Signed-off-by: Miklos Tirpak <miklos.tirpak@gmail.com> Change-Id: I944a98513018840f904f2808c2a1e963b37886cc