[  523.734574] netdevsim netdevsim337 eni337np1: renamed from eth0
[  523.831312] netdevsim netdevsim663 eni663np1: renamed from eth1
[  524.030785] Could not find device with ifindex 2000 in netnsfd 11
[  524.030930] Could not find netns with fd: 2000
[  524.031001] Cannot link a netdevsim to itself
[  524.031086] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).