[  521.527399] netdevsim netdevsim723 eni723np1: renamed from eth1
[  521.623461] netdevsim netdevsim271 eni271np1: renamed from eth0
[  521.847790] Could not find device with ifindex 2000 in netnsfd 11
[  521.847984] Could not find netns with fd: 2000
[  521.848080] Cannot link a netdevsim to itself
[  521.848177] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).