ip addr report "state UNKNOWN" for some macvlan devices

Solution Verified - Updated -

Issue

  • Why do ip addr or ip link report state UNKNOWN for some macvlan devices?
[ root@rhel7 ] # ip link show testmcvlan1@em1
6: testmcvlan1@em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether aa:bb:cc:dd:ee:ff brd ff:ff:ff:ff:ff:ff

Environment

  • Red Hat Enterprise Linux 7
  • macvlan interfaces
  • ip addr command from iproute2 network command suite

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