[  456.630752] netdevsim netdevsim396 eni396np1: renamed from eth0
[  456.631696] netdevsim netdevsim533 eni533np1: renamed from eth0
[  456.735104] Could not find device with ifindex 2000 in netnsfd 11
[  456.735213] Could not find netns with fd: 2000
[  456.735259] Cannot link a netdevsim to itself
[  456.735309] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).