[  520.980806] netdevsim netdevsim400 eni400np1: renamed from eth0
[  521.077598] netdevsim netdevsim649 eni649np1: renamed from eth1
[  521.310760] Could not find device with ifindex 2000 in netnsfd 11
[  521.310976] Could not find netns with fd: 2000
[  521.311106] Cannot link a netdevsim to itself
[  521.311247] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).