[  509.464119] netdevsim netdevsim616 eni616np1: renamed from eth1
[  509.561472] netdevsim netdevsim510 eni510np1: renamed from eth0
[  509.760708] Could not find device with ifindex 2000 in netnsfd 11
[  509.760913] Could not find netns with fd: 2000
[  509.761008] Cannot link a netdevsim to itself
[  509.761128] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).