[  521.480705] netdevsim netdevsim539 eni539np1: renamed from eth1
[  521.578827] netdevsim netdevsim363 eni363np1: renamed from eth0
[  521.816428] Could not find device with ifindex 2000 in netnsfd 11
[  521.816622] Could not find netns with fd: 2000
[  521.816721] Cannot link a netdevsim to itself
[  521.816835] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).