[  521.121240] netdevsim netdevsim633 eni633np1: renamed from eth1
[  521.218272] netdevsim netdevsim267 eni267np1: renamed from eth0
[  521.450737] Could not find device with ifindex 2000 in netnsfd 11
[  521.450905] Could not find netns with fd: 2000
[  521.450998] Cannot link a netdevsim to itself
[  521.451101] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).