[  484.900817] netdevsim netdevsim256 eni256np1: renamed from eth0
[  484.901556] netdevsim netdevsim647 eni647np1: renamed from eth1
[  484.998521] Could not find device with ifindex 2000 in netnsfd 11
[  484.998621] Could not find netns with fd: 2000
[  484.998670] Cannot link a netdevsim to itself
[  484.998723] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).