[  512.485739] netdevsim netdevsim525 eni525np1: renamed from eth1
[  512.582784] netdevsim netdevsim421 eni421np1: renamed from eth0
[  512.778409] Could not find device with ifindex 2000 in netnsfd 11
[  512.778649] Could not find netns with fd: 2000
[  512.778744] Cannot link a netdevsim to itself
[  512.778848] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).