[  523.469172] netdevsim netdevsim639 eni639np1: renamed from eth1
[  523.566652] netdevsim netdevsim322 eni322np1: renamed from eth0
[  523.795821] Could not find device with ifindex 2000 in netnsfd 11
[  523.796050] Could not find netns with fd: 2000
[  523.796168] Cannot link a netdevsim to itself
[  523.796298] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).