[  523.429637] netdevsim netdevsim513 eni513np1: renamed from eth1
[  523.525833] netdevsim netdevsim307 eni307np1: renamed from eth0
[  523.785736] Could not find device with ifindex 2000 in netnsfd 11
[  523.786000] Could not find netns with fd: 2000
[  523.786128] Cannot link a netdevsim to itself
[  523.786276] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).