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question to stf interface (current)



Hello,

I provide an 6to4 router and use the stf interface.

ifconfig stf0

stf0: flags=1<UP> mtu 1280
        inet6 2002:8b12:1921:: prefixlen 16

dmesg now reports regularly errors. For example,

nd6_storelladdr: bad gateway address type inet6: 2002:8b12:1921:: for dst 2002:72f3:e21d:0:ad57:3c67:30ff:720e through interface vlan404

I think the packet to 2002:72f3:e21d:0:ad57:3c67:30ff:720e should be sendet to 114.243.226.29 via IPv4 and not via IPv6.

Here the interesting entries in the routing table:

Routing tables

Internet:
Destination Gateway Flags Refs Use Mtu Interface
default            139.18.25.38       UG          -        -      -L ixg0

...

Internet6:
Destination Gateway Flags Refs Use Mtu Interface

default 2001:638:c:a00a::1 UG - - - vlan404 2002::/16 2002:8b12:1921:: U - - - stf0 2002:8b12:1921:: link#30 UHL - - - lo0


In my opinion, the package to 2002:72f3:E21D:0:ad57:3c67:720e:30ff should be sent to the interface stf0. There will it be encapsulated in IPv4 and should be send via the IPv4 default route to Interface ixg0. The package must not be sent to the interface vlan404.

The message is only for packets with the sender 2002:8B12:1921:: (the router itself). If I send a ping packet to the affected addresses from the router everything works as fine. I can not force the fault so.


Does anyone have an idea where the messages could come from?


Thank you for your efforts


Regards
Uwe


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