[  487.537526] netdevsim netdevsim631 eni631np1: renamed from eth1
[  487.633719] netdevsim netdevsim308 eni308np1: renamed from eth0
[  487.843298] Could not find device with ifindex 2000 in netnsfd 11
[  487.843568] Could not find netns with fd: 2000
[  487.843659] Cannot link a netdevsim to itself
[  487.843784] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).