Package: network-manager Version: 1.40.4-1 Tags: ipv6 Dear Maintainer,
Whenever I reconnect to the network, accept_ra is reset to 0 by network-manager, which makes ipv6 inaccessible. The only way to workaround it is to set a hard-coded address. $ nmcli con d con $ sudo sysctl net.ipv6.conf.enp2s0.accept_ra=1 net.ipv6.conf.enp2s0.accept_ra = 1 $ nmcli con u con $ sysctl net.ipv6.conf.enp2s0.accept_ra net.ipv6.conf.enp2s0.accept_ra = 0 $ sysctl net.ipv6.conf.all net.ipv6.conf.all.accept_dad = 0 net.ipv6.conf.all.accept_ra = 1 net.ipv6.conf.all.accept_ra_defrtr = 1 net.ipv6.conf.all.accept_ra_from_local = 0 net.ipv6.conf.all.accept_ra_min_hop_limit = 1 net.ipv6.conf.all.accept_ra_mtu = 1 net.ipv6.conf.all.accept_ra_pinfo = 1 net.ipv6.conf.all.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.all.accept_ra_rt_info_min_plen = 0 net.ipv6.conf.all.accept_ra_rtr_pref = 1 net.ipv6.conf.all.accept_redirects = 1 net.ipv6.conf.all.accept_source_route = 0 net.ipv6.conf.all.accept_untracked_na = 0 net.ipv6.conf.all.addr_gen_mode = 0 net.ipv6.conf.all.autoconf = 1 net.ipv6.conf.all.dad_transmits = 1 net.ipv6.conf.all.disable_ipv6 = 0 net.ipv6.conf.all.disable_policy = 0 net.ipv6.conf.all.drop_unicast_in_l2_multicast = 0 net.ipv6.conf.all.drop_unsolicited_na = 0 net.ipv6.conf.all.enhanced_dad = 1 net.ipv6.conf.all.force_mld_version = 0 net.ipv6.conf.all.force_tllao = 0 net.ipv6.conf.all.forwarding = 0 net.ipv6.conf.all.hop_limit = 64 net.ipv6.conf.all.ignore_routes_with_linkdown = 0 net.ipv6.conf.all.ioam6_enabled = 0 net.ipv6.conf.all.ioam6_id = 65535 net.ipv6.conf.all.ioam6_id_wide = 4294967295 net.ipv6.conf.all.keep_addr_on_down = 0 net.ipv6.conf.all.max_addresses = 16 net.ipv6.conf.all.max_desync_factor = 600 net.ipv6.conf.all.mc_forwarding = 0 net.ipv6.conf.all.mldv1_unsolicited_report_interval = 10000 net.ipv6.conf.all.mldv2_unsolicited_report_interval = 1000 net.ipv6.conf.all.mtu = 1280 net.ipv6.conf.all.ndisc_evict_nocarrier = 1 net.ipv6.conf.all.ndisc_notify = 0 net.ipv6.conf.all.ndisc_tclass = 0 net.ipv6.conf.all.optimistic_dad = 0 net.ipv6.conf.all.proxy_ndp = 0 net.ipv6.conf.all.ra_defrtr_metric = 1024 net.ipv6.conf.all.regen_max_retry = 3 net.ipv6.conf.all.router_probe_interval = 60 net.ipv6.conf.all.router_solicitation_delay = 1 net.ipv6.conf.all.router_solicitation_interval = 4 net.ipv6.conf.all.router_solicitation_max_interval = 3600 net.ipv6.conf.all.router_solicitations = -1 net.ipv6.conf.all.rpl_seg_enabled = 0 net.ipv6.conf.all.seg6_enabled = 0 net.ipv6.conf.all.seg6_require_hmac = 0 sysctl: permission denied on key 'net.ipv6.conf.all.stable_secret' net.ipv6.conf.all.suppress_frag_ndisc = 1 net.ipv6.conf.all.temp_prefered_lft = 86400 net.ipv6.conf.all.temp_valid_lft = 604800 net.ipv6.conf.all.use_oif_addrs_only = 0 net.ipv6.conf.all.use_optimistic = 0 net.ipv6.conf.all.use_tempaddr = 0 $ sysctl net.ipv6.conf.enp2s0 net.ipv6.conf.enp2s0.accept_dad = 1 net.ipv6.conf.enp2s0.accept_ra = 0 net.ipv6.conf.enp2s0.accept_ra_defrtr = 1 net.ipv6.conf.enp2s0.accept_ra_from_local = 0 net.ipv6.conf.enp2s0.accept_ra_min_hop_limit = 1 net.ipv6.conf.enp2s0.accept_ra_mtu = 1 net.ipv6.conf.enp2s0.accept_ra_pinfo = 1 net.ipv6.conf.enp2s0.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.enp2s0.accept_ra_rt_info_min_plen = 0 net.ipv6.conf.enp2s0.accept_ra_rtr_pref = 1 net.ipv6.conf.enp2s0.accept_redirects = 1 net.ipv6.conf.enp2s0.accept_source_route = 0 net.ipv6.conf.enp2s0.accept_untracked_na = 0 net.ipv6.conf.enp2s0.addr_gen_mode = 1 net.ipv6.conf.enp2s0.autoconf = 1 net.ipv6.conf.enp2s0.dad_transmits = 1 net.ipv6.conf.enp2s0.disable_ipv6 = 0 net.ipv6.conf.enp2s0.disable_policy = 0 net.ipv6.conf.enp2s0.drop_unicast_in_l2_multicast = 0 net.ipv6.conf.enp2s0.drop_unsolicited_na = 0 net.ipv6.conf.enp2s0.enhanced_dad = 1 net.ipv6.conf.enp2s0.force_mld_version = 0 net.ipv6.conf.enp2s0.force_tllao = 0 net.ipv6.conf.enp2s0.forwarding = 0 net.ipv6.conf.enp2s0.hop_limit = 64 net.ipv6.conf.enp2s0.ignore_routes_with_linkdown = 0 net.ipv6.conf.enp2s0.ioam6_enabled = 0 net.ipv6.conf.enp2s0.ioam6_id = 65535 net.ipv6.conf.enp2s0.ioam6_id_wide = 4294967295 net.ipv6.conf.enp2s0.keep_addr_on_down = 0 net.ipv6.conf.enp2s0.max_addresses = 16 net.ipv6.conf.enp2s0.max_desync_factor = 600 net.ipv6.conf.enp2s0.mc_forwarding = 0 net.ipv6.conf.enp2s0.mldv1_unsolicited_report_interval = 10000 net.ipv6.conf.enp2s0.mldv2_unsolicited_report_interval = 1000 net.ipv6.conf.enp2s0.mtu = 1500 net.ipv6.conf.enp2s0.ndisc_evict_nocarrier = 1 net.ipv6.conf.enp2s0.ndisc_notify = 0 net.ipv6.conf.enp2s0.ndisc_tclass = 0 net.ipv6.conf.enp2s0.optimistic_dad = 0 net.ipv6.conf.enp2s0.proxy_ndp = 0 net.ipv6.conf.enp2s0.ra_defrtr_metric = 1024 net.ipv6.conf.enp2s0.regen_max_retry = 3 net.ipv6.conf.enp2s0.router_probe_interval = 60 net.ipv6.conf.enp2s0.router_solicitation_delay = 1 net.ipv6.conf.enp2s0.router_solicitation_interval = 4 net.ipv6.conf.enp2s0.router_solicitation_max_interval = 3600 net.ipv6.conf.enp2s0.router_solicitations = -1 net.ipv6.conf.enp2s0.rpl_seg_enabled = 0 net.ipv6.conf.enp2s0.seg6_enabled = 0 net.ipv6.conf.enp2s0.seg6_require_hmac = 0 sysctl: permission denied on key 'net.ipv6.conf.enp2s0.stable_secret' net.ipv6.conf.enp2s0.suppress_frag_ndisc = 1 net.ipv6.conf.enp2s0.temp_prefered_lft = 86400 net.ipv6.conf.enp2s0.temp_valid_lft = 604800 net.ipv6.conf.enp2s0.use_oif_addrs_only = 0 net.ipv6.conf.enp2s0.use_optimistic = 0 net.ipv6.conf.enp2s0.use_tempaddr = 0 $ cat /etc/NetworkManager/system-connections/con [connection] id=con uuid=xxx type=ethernet interface-name=enp2s0 timestamp=1669737523 [ethernet] auto-negotiate=true cloned-mac-address=xxx mac-address=xxx [ipv4] address1=xxx dns=xxx method=manual [ipv6] addr-gen-mode=eui64 dns=xxx method=auto [proxy]