[  495.583725] netdevsim netdevsim537 eni537np1: renamed from eth1
[  495.678646] netdevsim netdevsim437 eni437np1: renamed from eth0
[  495.947466] Could not find device with ifindex 2000 in netnsfd 11
[  495.947843] Could not find netns with fd: 2000
[  495.947929] Cannot link a netdevsim to itself
[  495.948037] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).