[  486.671283] netdevsim netdevsim637 eni637np1: renamed from eth1
[  486.767715] netdevsim netdevsim501 eni501np1: renamed from eth0
[  486.975510] Could not find device with ifindex 2000 in netnsfd 11
[  486.975857] Could not find netns with fd: 2000
[  486.975962] Cannot link a netdevsim to itself
[  486.976073] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).