[  487.371862] netdevsim netdevsim643 eni643np1: renamed from eth1
[  487.468241] netdevsim netdevsim381 eni381np1: renamed from eth0
[  487.689724] Could not find device with ifindex 2000 in netnsfd 11
[  487.690149] Could not find netns with fd: 2000
[  487.690258] Cannot link a netdevsim to itself
[  487.690387] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).