[  486.357866] netdevsim netdevsim507 eni507np1: renamed from eth0
[  486.459212] netdevsim netdevsim684 eni684np1: renamed from eth1
[  486.789053] Could not find device with ifindex 2000 in netnsfd 11
[  486.789193] Could not find netns with fd: 2000
[  486.789271] Cannot link a netdevsim to itself
[  486.789382] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).