[  520.171962] netdevsim netdevsim511 eni511np1: renamed from eth0
[  520.268973] netdevsim netdevsim616 eni616np1: renamed from eth1
[  520.499997] Could not find device with ifindex 2000 in netnsfd 11
[  520.500195] Could not find netns with fd: 2000
[  520.500291] Cannot link a netdevsim to itself
[  520.500413] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).