[  473.549753] netdevsim netdevsim644 eni644np1: renamed from eth1
[  473.549957] netdevsim netdevsim338 eni338np1: renamed from eth0
[  473.625667] Could not find device with ifindex 2000 in netnsfd 11
[  473.625825] Could not find netns with fd: 2000
[  473.625930] Cannot link a netdevsim to itself
[  473.626043] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).