[ 1030.156579][T12677] netdevsim netdevsim412 eni412np1: renamed from eth0 [ 1030.169238][T12726] netdevsim netdevsim595 eni595np1: renamed from eth1 [ 1031.878962][T12722] Could not find device with ifindex 2000 in netnsfd 11 [ 1031.880006][T12722] Could not find netns with fd: 2000 [ 1031.880668][T12722] Cannot link a netdevsim to itself [ 1031.881452][T12722] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).