[  473.454160] netdevsim netdevsim407 eni407np1: renamed from eth0
[  473.455234] netdevsim netdevsim687 eni687np1: renamed from eth0
[  473.531087] Could not find device with ifindex 2000 in netnsfd 11
[  473.531195] Could not find netns with fd: 2000
[  473.531250] Cannot link a netdevsim to itself
[  473.531309] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).