[  487.300513] netdevsim netdevsim468 eni468np1: renamed from eth0
[  487.396528] netdevsim netdevsim621 eni621np1: renamed from eth1
[  487.609174] Could not find device with ifindex 2000 in netnsfd 11
[  487.609554] Could not find netns with fd: 2000
[  487.609675] Cannot link a netdevsim to itself
[  487.609817] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).