[  523.593867] netdevsim netdevsim305 eni305np1: renamed from eth0
[  523.692235] netdevsim netdevsim721 eni721np1: renamed from eth1
[  523.915234] Could not find device with ifindex 2000 in netnsfd 11
[  523.915395] Could not find netns with fd: 2000
[  523.915471] Cannot link a netdevsim to itself
[  523.915567] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).