SLAAC not working

[Ultima]

Do you have pf or ipfw running? are they accepting ICMP type 128, 129, 135,
136? the first 2 are for ping requests last 2 for Neighbor
solicitation/advertisement.

On Sat, Aug 5, 2017 at 8:35 PM, Greg Rivers <gcr+freebsd-stable at tharned.org>
wrote:

> I have a couple of hosts on different networks running 11.1-RELEASE amd64.
> Neither host will auto-configure its IPv6 address, even though valid router
> advertisements[1] are present. Both hosts have two oce(4) interfaces
> aggregated in fail-over mode via lagg(4). The lagg interface is configured
> thusly (/etc/rc.conf):
>
> ifconfig_oce0="up"
> ifconfig_oce1="up"
> cloned_interfaces="lagg0"
> ifconfig_lagg0="inet xxx.xxx.217.100/25 laggproto failover laggport oce0
> laggport oce1"
> defaultrouter="xxx.xxx.217.1"
> ip6addrctl_policy="ipv6_prefer"
> ifconfig_lagg0_ipv6="inet6 accept_rtadv"
> rtsold_enable="YES"
>
> The running interface looks like this:
> lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> 1500
>         options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_
> MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO>
>         ether ac:16:2d:1e:b8:80
>         inet xxx.xxx.217.100 netmask 0xffffff80 broadcast xxx.xxx.217.127
>         inet6 fe80::ae16:2dff:fe1e:b880%lagg0 prefixlen 64 scopeid 0xc
>         nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
>         media: Ethernet autoselect
>         status: active
>         groups: lagg
>         laggproto failover lagghash l2,l3,l4
>         laggport: oce0 flags=5<MASTER,ACTIVE>
>         laggport: oce1 flags=0<>
>
> ndp(8) shows only:
> Neighbor                             Linklayer Address  Netif Expire    S
> Flags
> fe80::ae16:2dff:fe1e:b880%lagg0      ac:16:2d:1e:b8:80  lagg0 permanent R
>
> Other hosts (running RedHat 6) on the same network SLAAC just fine. Does
> anyone have insight into this problem or suggestions for troubleshooting?
>
> --
> Greg Rivers
>
>
> [1]
> Internet Control Message Protocol v6
>     Type: Router Advertisement (134)
>     Code: 0
>     Checksum: 0x8176 [correct]
>     [Checksum Status: Good]
>     Cur hop limit: 64
>     Flags: 0x00, Prf (Default Router Preference): Medium
>         0... .... = Managed address configuration: Not set
>         .0.. .... = Other configuration: Not set
>         ..0. .... = Home Agent: Not set
>         ...0 0... = Prf (Default Router Preference): Medium (0)
>         .... .0.. = Proxy: Not set
>         .... ..0. = Reserved: 0
>     Router lifetime (s): 1800
>     Reachable time (ms): 0
>     Retrans timer (ms): 0
>     ICMPv6 Option (Source link-layer address : 64:a0:e7:45:63:43)
>         Type: Source link-layer address (1)
>         Length: 1 (8 bytes)
>         Link-layer address: Cisco_45:63:43 (64:a0:e7:45:63:43)
>     ICMPv6 Option (Prefix information : 26xx:xxxx:4013:23::/64)
>         Type: Prefix information (3)
>         Length: 4 (32 bytes)
>         Prefix Length: 64
>         Flag: 0xc0, On-link flag(L), Autonomous address-configuration
> flag(A)
>             1... .... = On-link flag(L): Set
>             .1.. .... = Autonomous address-configuration flag(A): Set
>             ..0. .... = Router address flag(R): Not set
>             ...0 0000 = Reserved: 0
>         Valid Lifetime: 2592000
>         Preferred Lifetime: 604800
>         Reserved
>         Prefix: 26xx:xxxx:4013:23::
>     ICMPv6 Option (MTU : 9216)
>         Type: MTU (5)
>         Length: 1 (8 bytes)
>         Reserved
>         MTU: 9216
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