[ 1014.252904][T12641] netdevsim netdevsim386 eni386np1: renamed from eth0 [ 1014.315844][T12575] netdevsim netdevsim610 eni610np1: renamed from eth1 [ 1016.085180][T12721] Could not find device with ifindex 2000 in netnsfd 11 [ 1016.086209][T12721] Could not find netns with fd: 2000 [ 1016.086953][T12721] Cannot link a netdevsim to itself [ 1016.087757][T12721] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).