[  522.288531] netdevsim netdevsim535 eni535np1: renamed from eth1
[  522.384551] netdevsim netdevsim440 eni440np1: renamed from eth0
[  522.635765] Could not find device with ifindex 2000 in netnsfd 11
[  522.635952] Could not find netns with fd: 2000
[  522.636026] Cannot link a netdevsim to itself
[  522.636127] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).