[  523.478035] netdevsim netdevsim728 eni728np1: renamed from eth1
[  523.576311] netdevsim netdevsim306 eni306np1: renamed from eth0
[  523.821533] Could not find device with ifindex 2000 in netnsfd 11
[  523.821742] Could not find netns with fd: 2000
[  523.821843] Cannot link a netdevsim to itself
[  523.821960] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).