[  473.678570] netdevsim netdevsim557 eni557np1: renamed from eth1
[  473.679070] netdevsim netdevsim451 eni451np1: renamed from eth0
[  473.757445] Could not find device with ifindex 2000 in netnsfd 11
[  473.757537] Could not find netns with fd: 2000
[  473.757586] Cannot link a netdevsim to itself
[  473.757634] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).