[  488.831320] netdevsim netdevsim506 eni506np1: renamed from eth0
[  488.832371] netdevsim netdevsim704 eni704np1: renamed from eth0
[  488.904435] Could not find device with ifindex 2000 in netnsfd 11
[  488.904562] Could not find netns with fd: 2000
[  488.904663] Cannot link a netdevsim to itself
[  488.904794] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).