[  522.320933] netdevsim netdevsim261 eni261np1: renamed from eth0
[  522.417978] netdevsim netdevsim523 eni523np1: renamed from eth1
[  522.681510] Could not find device with ifindex 2000 in netnsfd 11
[  522.681752] Could not find netns with fd: 2000
[  522.681860] Cannot link a netdevsim to itself
[  522.682009] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).