[  491.010100] netdevsim netdevsim727 eni727np1: renamed from eth1
[  491.106567] netdevsim netdevsim456 eni456np1: renamed from eth0
[  491.312402] Could not find device with ifindex 2000 in netnsfd 11
[  491.312683] Could not find netns with fd: 2000
[  491.312753] Cannot link a netdevsim to itself
[  491.312837] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).