[  513.477486] netdevsim netdevsim657 eni657np1: renamed from eth1
[  513.574647] netdevsim netdevsim420 eni420np1: renamed from eth0
[  513.790791] Could not find device with ifindex 2000 in netnsfd 11
[  513.790950] Could not find netns with fd: 2000
[  513.791020] Cannot link a netdevsim to itself
[  513.791108] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).