IPv6 Errors in logs



  • I keep getting the following over and over again in my routing log:

    Jun 15 22:23:48 radvd 62177 our AdvPreferredLifetime on em0 for 2604:5500:c078:8000:: doesn't agree with fe80::768e:f8ff:fea6:6e01
    Jun 15 22:23:48 radvd 62177 our AdvValidLifetime on em0 for 2604:5500:c078:8000:: doesn't agree with fe80::768e:f8ff:fea6:6e01
    Jun 15 22:23:48 radvd 62177 our AdvOtherConfigFlag on em0 doesn't agree with fe80::768e:f8ff:fea6:6e01
    Jun 15 22:23:48 radvd 62177 our AdvManagedFlag on em0 doesn't agree with fe80::768e:f8ff:fea6:6e01

    em0 and associated ipv6 ranges are on my WAN interface.

    This has been happening for months now, but IPv6 seems to be working just fine.

    Using Track interface, with /56 prefix. Router mode is set to managed in case that's relevant.

    Any ideas, suggestions?



  • @mgittelman what is the device on your network with ip address fe80::768e:f8ff:fea6:6e01? Is it possibly also running radvd? I had this same error and found my wireless access point running DD-WRT had IPv6 enabled and was running radvd. Disabling radvd on the access point resolved the conflict.



  • Thanks, I thought about that, but the address in question is clearly listed as my WAN gateway:

    IPv6 Address
    2604:5500:c078:8000:xxx:xxxx:xxxx:xxxx
    Subnet mask IPv6
    64
    Gateway IPv6
    fe80::768e:f8ff:fea6:6e01

    The only other device I can think of that could possible run misc network services would be my Aruba AP whose IP doesn't match.

    I have no other router on my LAN.


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