[  484.022429] netdevsim netdevsim720 eni720np1: renamed from eth1
[  484.122890] netdevsim netdevsim503 eni503np1: renamed from eth0
[  484.516076] Could not find device with ifindex 2000 in netnsfd 11
[  484.516228] Could not find netns with fd: 2000
[  484.516306] Cannot link a netdevsim to itself
[  484.516400] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).