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Disable stateless ipv6 address generation


I try to setup ip for server using /etc/conf.d/net.eth0

ipaddr=" 2a03:xxxx:xxxx:xxxx::6/64"

but interface acquire 3 ipv6 addresses

# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet  netmask  broadcast
        inet6 2a03:xxxx:xxxx:xxxx:aaaa:aaaa:aaaa:aaaa  prefixlen 64  scopeid 0x0<global>
        inet6 2a03:xxxx:xxxx:xxxx::6  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::aaaa:aaaa:aaaa:aaaa  prefixlen 64  scopeid 0x20<link>
        ether aa:aa:aa:aa:aa:aa  txqueuelen 1000  (Ethernet)
        RX packets 3448832  bytes 2497999401 (2.3 GiB)
        RX errors 0  dropped 222  overruns 0  frame 0
        TX packets 4594668  bytes 5355598657 (4.9 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

how can I exclude "2a03:xxxx:xxxx:xxxx:aaaa:aaaa:aaaa:aaaa"?


PS: neighbor discovery is enable on router and cannot be disabled because needed by other pc. 

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