[  459.250255] netdevsim netdevsim623 eni623np1: renamed from eth1
[  459.250740] netdevsim netdevsim389 eni389np1: renamed from eth0
[  459.337765] Could not find device with ifindex 2000 in netnsfd 11
[  459.337882] Could not find netns with fd: 2000
[  459.337929] Cannot link a netdevsim to itself
[  459.337980] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).