[  522.892611] netdevsim netdevsim721 eni721np1: renamed from eth1
[  522.982507] netdevsim netdevsim416 eni416np1: renamed from eth0
[  523.478941] Could not find device with ifindex 2000 in netnsfd 11
[  523.479244] Could not find netns with fd: 2000
[  523.479386] Cannot link a netdevsim to itself
[  523.479560] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).