[  489.791461] netdevsim netdevsim505 eni505np1: renamed from eth0
[  489.791644] netdevsim netdevsim680 eni680np1: renamed from eth1
[  489.883950] Could not find device with ifindex 2000 in netnsfd 11
[  489.884096] Could not find netns with fd: 2000
[  489.884193] Cannot link a netdevsim to itself
[  489.884309] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).