[  485.517874] netdevsim netdevsim300 eni300np1: renamed from eth0
[  485.618280] netdevsim netdevsim747 eni747np1: renamed from eth1
[  486.000690] Could not find device with ifindex 2000 in netnsfd 11
[  486.000845] Could not find netns with fd: 2000
[  486.000926] Cannot link a netdevsim to itself
[  486.001022] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).