[  635.645769][ T9977] netdevsim netdevsim728 eni728np1: renamed from eth1
[  635.655150][ T9981] netdevsim netdevsim481 eni481np1: renamed from eth0
[  636.726384][ T9966] Could not find device with ifindex 2000 in netnsfd 11
[  636.727433][ T9966] Could not find netns with fd: 2000
[  636.728184][ T9966] Cannot link a netdevsim to itself
[  636.729469][ T9966] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).