[  484.218172] netdevsim netdevsim303 eni303np1: renamed from eth0
[  484.319375] netdevsim netdevsim639 eni639np1: renamed from eth1
[  484.667526] Could not find device with ifindex 2000 in netnsfd 11
[  484.667693] Could not find netns with fd: 2000
[  484.667785] Cannot link a netdevsim to itself
[  484.667901] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).