[  516.007974] netdevsim netdevsim456 eni456np1: renamed from eth0
[  516.105680] netdevsim netdevsim663 eni663np1: renamed from eth1
[  516.356300] Could not find device with ifindex 2000 in netnsfd 11
[  516.356497] Could not find netns with fd: 2000
[  516.356598] Cannot link a netdevsim to itself
[  516.356705] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).