ipv6 link local becomes tentative and dadfailed

Solution Unverified - Updated -

Issue

  • ipv6 link local becomes tentative and dadfailed

Sample log:

3: ens8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 52:54:00:36:f2:9f brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.47/24 brd 172.16.1.255 scope global noprefixroute ens8
       valid_lft forever preferred_lft forever
    inet6 fe80::f06f:de79:e34b:7d21/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::a525:da3e:399:f5d4/64 scope link tentative noprefixroute dadfailed 
       valid_lft forever preferred_lft forever

Environment

  • Red Hat Enterprise Linux 7

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