[  522.665593] netdevsim netdevsim680 eni680np1: renamed from eth1
[  522.761595] netdevsim netdevsim506 eni506np1: renamed from eth0
[  522.997999] Could not find device with ifindex 2000 in netnsfd 11
[  522.998174] Could not find netns with fd: 2000
[  522.998285] Cannot link a netdevsim to itself
[  522.998379] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).