/** See if we already know about this subif */
clib_memset (&subif_addr, 0, sizeof (subif_addr));
subif_addr.sw_if_index = sw_if_index;
/** See if we already know about this subif */
clib_memset (&subif_addr, 0, sizeof (subif_addr));
subif_addr.sw_if_index = sw_if_index;