On 12 Jun, Gabriele Cerami wrote: > + /* RFC4191 section 2.2 */ > + if (ntohs(ra->router_lifetime) == 0) { > + ra->mo_flags &= IPV6_ND_RA_OPT_PRF_RESET_MASK; > + } Sorry for the spamming, not having test coverage for this part is proving challenging. I wonder if it's best to add an option for this too ...