[  475.503404] netdevsim netdevsim623 eni623np1: renamed from eth1
[  475.504556] netdevsim netdevsim347 eni347np1: renamed from eth0
[  475.594123] Could not find device with ifindex 2000 in netnsfd 11
[  475.594230] Could not find netns with fd: 2000
[  475.594298] Cannot link a netdevsim to itself
[  475.594349] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).