[  487.492498] netdevsim netdevsim638 eni638np1: renamed from eth1
[  487.589709] netdevsim netdevsim316 eni316np1: renamed from eth0
[  487.809725] Could not find device with ifindex 2000 in netnsfd 11
[  487.810057] Could not find netns with fd: 2000
[  487.810181] Cannot link a netdevsim to itself
[  487.810296] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).