[  521.172369] netdevsim netdevsim507 eni507np1: renamed from eth0
[  521.269228] netdevsim netdevsim659 eni659np1: renamed from eth1
[  521.518546] Could not find device with ifindex 2000 in netnsfd 11
[  521.518744] Could not find netns with fd: 2000
[  521.518827] Cannot link a netdevsim to itself
[  521.518924] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).