[  474.849806] netdevsim netdevsim452 eni452np1: renamed from eth0
[  474.850604] netdevsim netdevsim721 eni721np1: renamed from eth0
[  474.934767] Could not find device with ifindex 2000 in netnsfd 11
[  474.934860] Could not find netns with fd: 2000
[  474.934916] Cannot link a netdevsim to itself
[  474.934974] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).