[  485.979840] netdevsim netdevsim500 eni500np1: renamed from eth0
[  486.080835] netdevsim netdevsim750 eni750np1: renamed from eth1
[  486.450518] Could not find device with ifindex 2000 in netnsfd 11
[  486.450699] Could not find netns with fd: 2000
[  486.450817] Cannot link a netdevsim to itself
[  486.450954] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).