[ 1036.132424][T12678] netdevsim netdevsim285 eni285np1: renamed from eth0 [ 1036.158453][T12677] netdevsim netdevsim648 eni648np1: renamed from eth1 [ 1038.003484][T12722] Could not find device with ifindex 2000 in netnsfd 11 [ 1038.004413][T12722] Could not find netns with fd: 2000 [ 1038.005057][T12722] Cannot link a netdevsim to itself [ 1038.005806][T12722] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).