[  474.237223] netdevsim netdevsim623 eni623np1: renamed from eth1
[  474.237667] netdevsim netdevsim320 eni320np1: renamed from eth0
[  474.321371] Could not find device with ifindex 2000 in netnsfd 11
[  474.321502] Could not find netns with fd: 2000
[  474.321614] Cannot link a netdevsim to itself
[  474.321732] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).