[  523.097228] netdevsim netdevsim636 eni636np1: renamed from eth1
[  523.194134] netdevsim netdevsim341 eni341np1: renamed from eth0
[  523.472416] Could not find device with ifindex 2000 in netnsfd 11
[  523.472685] Could not find netns with fd: 2000
[  523.472807] Cannot link a netdevsim to itself
[  523.472904] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).