[   38.884492][  T695] netdevsim netdevsim620 eni620np1: renamed from eth1
[   38.981066][  T764] netdevsim netdevsim300 eni300np1: renamed from eth0
[   40.831777][  T841] Could not find device with ifindex 2000 in netnsfd 11
[   40.832743][  T841] Could not find netns with fd: 2000
[   40.833417][  T841] Cannot link a netdevsim to itself
[   40.834479][  T841] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).