[  487.640325] netdevsim netdevsim669 eni669np1: renamed from eth1
[  487.737499] netdevsim netdevsim311 eni311np1: renamed from eth0
[  487.956206] Could not find device with ifindex 2000 in netnsfd 11
[  487.956372] Could not find netns with fd: 2000
[  487.956446] Cannot link a netdevsim to itself
[  487.956547] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).