[  521.200214] netdevsim netdevsim422 eni422np1: renamed from eth0
[  521.296946] netdevsim netdevsim699 eni699np1: renamed from eth1
[  521.547429] Could not find device with ifindex 2000 in netnsfd 11
[  521.547642] Could not find netns with fd: 2000
[  521.547725] Cannot link a netdevsim to itself
[  521.547824] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).