[  523.339189] netdevsim netdevsim257 eni257np1: renamed from eth0
[  523.435976] netdevsim netdevsim739 eni739np1: renamed from eth1
[  523.718262] Could not find device with ifindex 2000 in netnsfd 11
[  523.718483] Could not find netns with fd: 2000
[  523.718570] Cannot link a netdevsim to itself
[  523.718675] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).