Date: Fri, 20 Jun 2014 07:45:54 -0500 From: Larry Rosenman <ler@lerctr.org> To: Hiroki Sato <hrs@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: IPv6: "xxx::x already configured" in logs... =?UTF-8?Q?why=3F?= Message-ID: <0c5bc901eba87f35e58390b686cee5ab@thebighonker.lerctr.org> In-Reply-To: <20140620.130812.1612764660960146940.hrs@allbsd.org> References: <20140612202349.GA65079@thebighonker.lerctr.org> <20140619.181129.1279477227287764712.hrs@allbsd.org> <20140619140801.GA65420@thebighonker.lerctr.org> <20140620.130812.1612764660960146940.hrs@allbsd.org>
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On 2014-06-19 23:08, Hiroki Sato wrote: > Larry Rosenman <ler@lerctr.org> wrote > in <20140619140801.GA65420@thebighonker.lerctr.org>: > > le> > le> Ideas? (I may be an idiot, so any criticism welcomed). > le> > le> > le> > le> if you need the 1841's config, I can supply that as well. > It's using a Hurricane > le> > le> electric Tunnel. > le> > > le> > How frequent were the log message added into /var/log/messages? > And > le> > when did it start to happen after boot. Just after lagg0 is > le> > configured? > le> > > le> > -- Hiroki > le> Looks like: > le> > le> Jun 12 07:00:01 thebighonker kernel: in6_ifadd: > 2001:470:1f0f:3ad:223:7dff:fe9e:6e8a is already configured > > Thank you. Three more questions: > > 1. output of "ifconfig lagg0", "ifconfig bce0", and "ifconfig bce1". > > 2. output of "netstat -s -i". > > 3. output of "ndp -p". > > The cause of the message is that the automatically-configured address > is not recognized as "configured" one and FreeBSD IPv6 stack is > trying to add it every time a Router Advertisement message is > received. I am still not sure why it happened, but the above three > would help for further investigation. > > -- Hiroki I updated the system from r267121M to r267653M and rebooted. The issue does NOT occur at this level. thebighonker.lerctr.org /etc/rc.d $ ifconfig lagg0 lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE> ether 00:23:7d:9e:6e:8a inet 192.147.25.65 netmask 0xffffff00 broadcast 192.147.25.255 inet6 fe80::223:7dff:fe9e:6e8a%lagg0 prefixlen 64 scopeid 0x4 inet 192.147.25.45 netmask 0xffffff00 broadcast 192.147.25.255 inet 192.147.25.11 netmask 0xffffff00 broadcast 192.147.25.255 inet 192.147.25.66 netmask 0xffffff00 broadcast 192.147.25.255 inet6 2001:470:1f0f:3ad:223:7dff:fe9e:6e8a prefixlen 64 autoconf nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL> media: Ethernet autoselect status: active laggproto loadbalance lagghash l2,l3,l4 laggport: bce1 flags=4<ACTIVE> laggport: bce0 flags=4<ACTIVE> thebighonker.lerctr.org /etc/rc.d $ ifconfig bce0 bce0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE> ether 00:23:7d:9e:6e:8a inet6 fe80::223:7dff:fe9e:6e8a%bce0 prefixlen 64 tentative scopeid 0x1 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active thebighonker.lerctr.org /etc/rc.d $ ifconfig bce1 bce1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE> ether 00:23:7d:9e:6e:8a inet6 fe80::223:7dff:fe9e:6e8a%bce1 prefixlen 64 tentative scopeid 0x2 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active thebighonker.lerctr.org /etc/rc.d $ thebighonker.lerctr.org /etc/rc.d $ netstat -s -i ip6 on bce0: 0 total input datagrams 0 datagrams with invalid header received 0 datagrams exceeded MTU received 0 datagrams with no route received 0 datagrams with invalid dst received 0 datagrams with unknown proto received 0 truncated datagrams received 0 input datagrams discarded 0 datagrams delivered to an upper layer protocol 0 datagrams forwarded to this interface 4 datagrams sent from an upper layer protocol 0 total discarded output datagrams 0 output datagrams fragmented 0 output datagrams failed on fragment 0 output datagrams succeeded on fragment 0 incoming datagrams fragmented 0 datagrams reassembled 0 datagrams failed on reassembly 0 multicast datagrams received 4 multicast datagrams sent ip6 on bce1: 0 total input datagrams 0 datagrams with invalid header received 0 datagrams exceeded MTU received 0 datagrams with no route received 0 datagrams with invalid dst received 0 datagrams with unknown proto received 0 truncated datagrams received 0 input datagrams discarded 0 datagrams delivered to an upper layer protocol 0 datagrams forwarded to this interface 4 datagrams sent from an upper layer protocol 0 total discarded output datagrams 0 output datagrams fragmented 0 output datagrams failed on fragment 0 output datagrams succeeded on fragment 0 incoming datagrams fragmented 0 datagrams reassembled 0 datagrams failed on reassembly 0 multicast datagrams received 4 multicast datagrams sent ip6 on lo0: 45224 total input datagrams 0 datagrams with invalid header received 0 datagrams exceeded MTU received 0 datagrams with no route received 0 datagrams with invalid dst received 0 datagrams with unknown proto received 0 truncated datagrams received 0 input datagrams discarded 45224 datagrams delivered to an upper layer protocol 0 datagrams forwarded to this interface 45224 datagrams sent from an upper layer protocol 0 total discarded output datagrams 0 output datagrams fragmented 0 output datagrams failed on fragment 0 output datagrams succeeded on fragment 0 incoming datagrams fragmented 0 datagrams reassembled 0 datagrams failed on reassembly 0 multicast datagrams received 0 multicast datagrams sent ip6 on lagg0: 66698 total input datagrams 0 datagrams with invalid header received 0 datagrams exceeded MTU received 0 datagrams with no route received 0 datagrams with invalid dst received 0 datagrams with unknown proto received 0 truncated datagrams received 1 input datagram discarded 66698 datagrams delivered to an upper layer protocol 0 datagrams forwarded to this interface 70844 datagrams sent from an upper layer protocol 0 total discarded output datagrams 1505 output datagrams fragmented 0 output datagrams failed on fragment 3037 output datagrams succeeded on fragment 477 incoming datagrams fragmented 224 datagrams reassembled 0 datagrams failed on reassembly 498 multicast datagrams received 3 multicast datagrams sent icmp6 on bce0: 0 total input messages 0 total input error messages 0 input destination unreachable errors 0 input administratively prohibited errors 0 input time exceeded errors 0 input parameter problem errors 0 input packet too big errors 0 input echo requests 0 input echo replies 0 input router solicitations 0 input router advertisements 0 input neighbor solicitations 0 input neighbor advertisements 0 input redirects 0 input MLD queries 0 input MLD reports 0 input MLD dones 0 total output messages 0 total output error messages 0 output destination unreachable errors 0 output administratively prohibited errors 0 output time exceeded errors 0 output parameter problem errors 0 output packet too big errors 0 output echo requests 0 output echo replies 0 output router solicitations 0 output router advertisements 0 output neighbor solicitations 0 output neighbor advertisements 0 output redirects 0 output MLD queries 0 output MLD reports 0 output MLD dones icmp6 on bce1: 0 total input messages 0 total input error messages 0 input destination unreachable errors 0 input administratively prohibited errors 0 input time exceeded errors 0 input parameter problem errors 0 input packet too big errors 0 input echo requests 0 input echo replies 0 input router solicitations 0 input router advertisements 0 input neighbor solicitations 0 input neighbor advertisements 0 input redirects 0 input MLD queries 0 input MLD reports 0 input MLD dones 0 total output messages 0 total output error messages 0 output destination unreachable errors 0 output administratively prohibited errors 0 output time exceeded errors 0 output parameter problem errors 0 output packet too big errors 0 output echo requests 0 output echo replies 0 output router solicitations 0 output router advertisements 0 output neighbor solicitations 0 output neighbor advertisements 0 output redirects 0 output MLD queries 0 output MLD reports 0 output MLD dones icmp6 on lo0: 4 total input messages 4 total input error messages 4 input destination unreachable errors 0 input administratively prohibited errors 0 input time exceeded errors 0 input parameter problem errors 0 input packet too big errors 0 input echo requests 0 input echo replies 0 input router solicitations 0 input router advertisements 0 input neighbor solicitations 0 input neighbor advertisements 0 input redirects 0 input MLD queries 0 input MLD reports 0 input MLD dones 4 total output messages 4 total output error messages 4 output destination unreachable errors 0 output administratively prohibited errors 0 output time exceeded errors 0 output parameter problem errors 0 output packet too big errors 0 output echo requests 0 output echo replies 0 output router solicitations 0 output router advertisements 0 output neighbor solicitations 0 output neighbor advertisements 0 output redirects 0 output MLD queries 0 output MLD reports 0 output MLD dones icmp6 on lagg0: 3475 total input messages 10 total input error messages 0 input destination unreachable errors 0 input administratively prohibited errors 0 input time exceeded errors 0 input parameter problem errors 10 input packet too big errors 0 input echo requests 6 input echo replies 0 input router solicitations 495 input router advertisements 1895 input neighbor solicitations 1069 input neighbor advertisements 0 input redirects 0 input MLD queries 0 input MLD reports 0 input MLD dones 2994 total output messages 22 total output error messages 22 output destination unreachable errors 0 output administratively prohibited errors 0 output time exceeded errors 0 output parameter problem errors 0 output packet too big errors 6 output echo requests 0 output echo replies 1 output router solicitation 0 output router advertisements 1069 output neighbor solicitations 1895 output neighbor advertisements 0 output redirects 0 output MLD queries 1 output MLD report 0 output MLD dones thebighonker.lerctr.org /etc/rc.d $ thebighonker.lerctr.org /etc/rc.d $ ndp -p 2001:470:1f0f:3ad::/64 if=lagg0 flags=LAO vltime=2592000, pltime=604800, expire=29d23h57m21s, ref=1 advertised by fe80::218:18ff:fe72:488%lagg0 (reachable) fe80::%lagg0/64 if=lagg0 flags=LAO vltime=infinity, pltime=infinity, expire=Never, ref=0 No advertising router fe80::%bce1/64 if=bce1 flags=LAO vltime=infinity, pltime=infinity, expire=Never, ref=0 No advertising router fe80::%bce0/64 if=bce0 flags=LAO vltime=infinity, pltime=infinity, expire=Never, ref=0 No advertising router fe80::%lo0/64 if=lo0 flags=LAO vltime=infinity, pltime=infinity, expire=Never, ref=0 No advertising router thebighonker.lerctr.org /etc/rc.d $ The local mods are Karl Denninger's ZFS ARC patch. So, I'm not sure what to say at this point. -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: ler@lerctr.org US Mail: 108 Turvey Cove, Hutto, TX 78634-5688
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