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; > + } For the same reason as v1 the ra here needs to be recalculated.