search terms: - slaac debugging linux - slaac "prefix not used" no ip address - slaac prefix "no ipv6 address" - "Stateful other conf" net.ipv6.conf.eth2.accept_ra = 1 net.ipv6.conf.eth2.accept_ra_defrtr = 0 net.ipv6.conf.eth2.accept_ra_pinfo = 0 net.ipv6.conf.eth2.accept_ra_rt_info_max_plen = 0 https://askubuntu.com/questions/652766/ipv6-slaac-icmpv6-router-advertisments-are-ignored-by-wlan1-interface ndisc6 gathers a few diagnostic tools for IPv6 networks including: - ndisc6, which performs ICMPv6 Neighbor Discovery in userland, - rdisc6, which performs ICMPv6 Router Discovery in userland, - rltraceroute6, a UDP/ICMP IPv6 implementation of traceroute, - tcptraceroute6, a TCP/IPv6-based traceroute implementation, - tcpspray6, a TCP/IP Discard/Echo bandwidth meter, - addrinfo, easy script interface for hostname and address resolution, - dnssort, DNS sorting script. root@gpc-rom:~# LC_ALL=C rdisc6 eth2 Soliciting ff02::2 (ff02::2) on eth2... Hop limit : 64 ( 0x40) Stateful address conf. : No Stateful other conf. : Yes Mobile home agent : No Router preference : medium Neighbor discovery proxy : No Router lifetime : 1800 (0x00000708) seconds Reachable time : unspecified (0x00000000) Retransmit time : unspecified (0x00000000) Prefix : 2a02:238:f065::/48 On-link : Yes Autonomous address conf.: Yes Valid time : 86400 (0x00015180) seconds Pref. time : 14400 (0x00003840) seconds Recursive DNS server : 2a02:238:f065::1 DNS server lifetime : 600 (0x00000258) seconds DNS search list : mogic.company DNS search list lifetime: 600 (0x00000258) seconds MTU : 1500 bytes (valid) Source link-layer address: 52:B8:45:B5:6B:33 from fe80::50b8:45ff:feb5:6b33 cweiske@gpc-rom:~$ nmcli device show eth2 root@gpc-rom:~# nmcli monitor root@gpc-rom:~# nmcli general logging level DEBUG domains ALL $ jourctrl NetworkManager[1297]: platform-linux: sysctl: setting '/proc/sys/net/ipv6/conf/eth2/accept_ra' to '1' (current value is '0') NetworkManager[1297]: platform-linux: sysctl: setting '/proc/sys/net/ipv6/conf/eth2/accept_ra_defrtr' to '0' (current value is identical) NetworkManager[1297]: platform-linux: sysctl: setting '/proc/sys/net/ipv6/conf/eth2/accept_ra_pinfo' to '0' (current value is identical) NetworkManager[1297]: platform-linux: sysctl: setting '/proc/sys/net/ipv6/conf/eth2/accept_ra_rtr_pref' to '0' (current value is identical) NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: router solicitation sent NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: scheduling router solicitation retry in 4 seconds. NetworkManager[1297]: ndisc-lndp[0x559bf34acd40,"eth2"]: processing libndp events NetworkManager[1297]: ndisc-lndp[0x559bf34acd40,"eth2"]: received router advertisement at 6554 NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: scheduling next now/lifetime check: 1800 seconds NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: neighbor discovery configuration changed [dGRSD]: NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: dhcp-level otherconf NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: gateway fe80::50b8:45ff:feb5:6b33 pref medium exp 1799,9981 NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: route 2a02:238:f065::/48 via :: pref medium exp 86399,9981 NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: dns_server 2a02:238:f065::1 exp 7199,9981 NetworkManager[1297]: ndisc[0x559bf34acd40,"eth2"]: dns_domain mogic.company exp 7199,9981 RFC 4861 M 1-bit "Managed address configuration" flag. When set, it indicates that addresses are available via Dynamic Host Configuration Protocol [DHCPv6]. If the M flag is set, the O flag is redundant and can be ignored because DHCPv6 will return all available configuration information. O 1-bit "Other configuration" flag. When set, it indicates that other configuration information is available via DHCPv6. Examples of such information are DNS-related information or information on other servers within the network. Note: If neither M nor O flags are set, this indicates that no information is available via DHCPv6. 64 bit präfix war das problem 48 war vorher, mit 64 gehts