[  473.296309] netdevsim netdevsim750 eni750np1: renamed from eth1
[  473.296502] netdevsim netdevsim500 eni500np1: renamed from eth0
[  473.384319] Could not find device with ifindex 2000 in netnsfd 11
[  473.384452] Could not find netns with fd: 2000
[  473.384555] Cannot link a netdevsim to itself
[  473.384668] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).