[  511.782372] netdevsim netdevsim450 eni450np1: renamed from eth0
[  511.880702] netdevsim netdevsim620 eni620np1: renamed from eth1
[  512.137522] Could not find device with ifindex 2000 in netnsfd 11
[  512.137785] Could not find netns with fd: 2000
[  512.137906] Cannot link a netdevsim to itself
[  512.138063] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).