[ 483.900750] netdevsim netdevsim666 eni666np1: renamed from eth1 [ 484.001143] netdevsim netdevsim402 eni402np1: renamed from eth0 [ 484.381263] Could not find device with ifindex 2000 in netnsfd 11 [ 484.381440] Could not find netns with fd: 2000 [ 484.381528] Cannot link a netdevsim to itself [ 484.381648] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).