[  519.681902] netdevsim netdevsim452 eni452np1: renamed from eth0
[  519.778773] netdevsim netdevsim521 eni521np1: renamed from eth1
[  520.020910] Could not find device with ifindex 2000 in netnsfd 11
[  520.021121] Could not find netns with fd: 2000
[  520.021230] Cannot link a netdevsim to itself
[  520.021365] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).