[  521.602023] netdevsim netdevsim635 eni635np1: renamed from eth1
[  521.699472] netdevsim netdevsim475 eni475np1: renamed from eth0
[  521.926328] Could not find device with ifindex 2000 in netnsfd 11
[  521.926526] Could not find netns with fd: 2000
[  521.926622] Cannot link a netdevsim to itself
[  521.926741] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).