[  488.611385] netdevsim netdevsim412 eni412np1: renamed from eth0
[  488.708788] netdevsim netdevsim721 eni721np1: renamed from eth1
[  488.935737] Could not find device with ifindex 2000 in netnsfd 11
[  488.936035] Could not find netns with fd: 2000
[  488.936126] Cannot link a netdevsim to itself
[  488.936248] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).