To zalezi, jak sofistikovany router mate. Pokud umi guest WLAN (wifi proo hosty) a napr. oddelegovavani prefixu na dalsi zarizeni v siti (virtualizujici reseni, brany mezi smart grid sitemi a IP sitemi, ...), tak opravdu jedna /64 stacit nebude. Pokud mate Huawei od O2, tak vam to asi stacit bude...