[  521.795646] netdevsim netdevsim504 eni504np1: renamed from eth0
[  521.892750] netdevsim netdevsim693 eni693np1: renamed from eth1
[  522.141449] Could not find device with ifindex 2000 in netnsfd 11
[  522.141668] Could not find netns with fd: 2000
[  522.141772] Cannot link a netdevsim to itself
[  522.141902] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).