[  522.643442] netdevsim netdevsim507 eni507np1: renamed from eth0
[  522.741437] netdevsim netdevsim630 eni630np1: renamed from eth1
[  522.973516] Could not find device with ifindex 2000 in netnsfd 11
[  522.973683] Could not find netns with fd: 2000
[  522.973775] Cannot link a netdevsim to itself
[  522.973877] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).