[  521.583218] netdevsim netdevsim309 eni309np1: renamed from eth0
[  521.680219] netdevsim netdevsim520 eni520np1: renamed from eth1
[  521.906476] Could not find device with ifindex 2000 in netnsfd 11
[  521.906651] Could not find netns with fd: 2000
[  521.906738] Cannot link a netdevsim to itself
[  521.906839] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).