[  526.983125] netdevsim netdevsim723 eni723np1: renamed from eth1
[  527.081430] netdevsim netdevsim309 eni309np1: renamed from eth0
[  527.283992] Could not find device with ifindex 2000 in netnsfd 11
[  527.284154] Could not find netns with fd: 2000
[  527.284232] Cannot link a netdevsim to itself
[  527.284342] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).