[  486.270268] netdevsim netdevsim642 eni642np1: renamed from eth1
[  486.367479] netdevsim netdevsim449 eni449np1: renamed from eth0
[  486.574894] Could not find device with ifindex 2000 in netnsfd 11
[  486.575165] Could not find netns with fd: 2000
[  486.575255] Cannot link a netdevsim to itself
[  486.575355] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).