[  773.909799][T14762] netdevsim netdevsim421 eni421np1: renamed from eth0
[  773.922415][T14764] netdevsim netdevsim737 eni737np1: renamed from eth1
[  774.504475][T14750] Could not find device with ifindex 2000 in netnsfd 11
[  774.505493][T14750] Could not find netns with fd: 2000
[  774.506071][T14750] Cannot link a netdevsim to itself
[  774.506545][T14750] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).