[  521.944899] netdevsim netdevsim668 eni668np1: renamed from eth1
[  522.042777] netdevsim netdevsim370 eni370np1: renamed from eth0
[  522.273406] Could not find device with ifindex 2000 in netnsfd 11
[  522.273624] Could not find netns with fd: 2000
[  522.273735] Cannot link a netdevsim to itself
[  522.273851] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).