[  527.562387] netdevsim netdevsim721 eni721np1: renamed from eth1
[  527.659825] netdevsim netdevsim363 eni363np1: renamed from eth0
[  527.929057] Could not find device with ifindex 2000 in netnsfd 11
[  527.929267] Could not find netns with fd: 2000
[  527.929378] Cannot link a netdevsim to itself
[  527.929512] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).