[  454.552333] netdevsim netdevsim603 eni603np1: renamed from eth1
[  454.554925] netdevsim netdevsim502 eni502np1: renamed from eth0
[  454.632658] Could not find device with ifindex 2000 in netnsfd 11
[  454.632766] Could not find netns with fd: 2000
[  454.632814] Cannot link a netdevsim to itself
[  454.632866] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).