[  483.311915] netdevsim netdevsim504 eni504np1: renamed from eth0
[  483.412625] netdevsim netdevsim515 eni515np1: renamed from eth1
[  483.751372] Could not find device with ifindex 2000 in netnsfd 11
[  483.751551] Could not find netns with fd: 2000
[  483.751649] Cannot link a netdevsim to itself
[  483.751761] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).