[  522.523669] netdevsim netdevsim512 eni512np1: renamed from eth1
[  522.620776] netdevsim netdevsim409 eni409np1: renamed from eth0
[  522.858621] Could not find device with ifindex 2000 in netnsfd 11
[  522.858786] Could not find netns with fd: 2000
[  522.858858] Cannot link a netdevsim to itself
[  522.858946] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).