[  457.868570] netdevsim netdevsim271 eni271np1: renamed from eth0
[  457.869593] netdevsim netdevsim620 eni620np1: renamed from eth0
[  457.983115] Could not find device with ifindex 2000 in netnsfd 11
[  457.983213] Could not find netns with fd: 2000
[  457.983256] Cannot link a netdevsim to itself
[  457.983305] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).