[  457.578964] netdevsim netdevsim644 eni644np1: renamed from eth1
[  457.579269] netdevsim netdevsim447 eni447np1: renamed from eth0
[  457.669701] Could not find device with ifindex 2000 in netnsfd 11
[  457.669882] Could not find netns with fd: 2000
[  457.670007] Cannot link a netdevsim to itself
[  457.670153] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).