[ 1321.608446][T12061] netdevsim netdevsim674 eni674np1: renamed from eth1 [ 1321.718143][T12062] netdevsim netdevsim485 eni485np1: renamed from eth0 [ 1325.153539][T12054] Could not find device with ifindex 2000 in netnsfd 11 [ 1325.154253][T12054] Could not find netns with fd: 2000 [ 1325.154830][T12054] Cannot link a netdevsim to itself [ 1325.155723][T12054] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).