[  493.076372] netdevsim netdevsim723 eni723np1: renamed from eth1
[  493.173227] netdevsim netdevsim400 eni400np1: renamed from eth0
[  493.393387] Could not find device with ifindex 2000 in netnsfd 11
[  493.393651] Could not find netns with fd: 2000
[  493.393743] Cannot link a netdevsim to itself
[  493.393864] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).