[  491.542173] netdevsim netdevsim300 eni300np1: renamed from eth0
[  491.643444] netdevsim netdevsim623 eni623np1: renamed from eth1
[  491.982862] Could not find device with ifindex 2000 in netnsfd 11
[  491.983017] Could not find netns with fd: 2000
[  491.983103] Cannot link a netdevsim to itself
[  491.983216] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).