[  546.259693] netdevsim netdevsim620 eni620np1: renamed from eth1
[  546.360181] netdevsim netdevsim421 eni421np1: renamed from eth0
[  546.684209] Could not find device with ifindex 2000 in netnsfd 11
[  546.684374] Could not find netns with fd: 2000
[  546.684453] Cannot link a netdevsim to itself
[  546.684548] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).