[  478.638507] netdevsim netdevsim511 eni511np1: renamed from eth0
[  478.639320] netdevsim netdevsim620 eni620np1: renamed from eth1
[  478.722475] Could not find device with ifindex 2000 in netnsfd 11
[  478.722585] Could not find netns with fd: 2000
[  478.722640] Cannot link a netdevsim to itself
[  478.722701] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).