[  474.520468] netdevsim netdevsim509 eni509np1: renamed from eth0
[  474.521123] netdevsim netdevsim637 eni637np1: renamed from eth0
[  474.601167] Could not find device with ifindex 2000 in netnsfd 11
[  474.601295] Could not find netns with fd: 2000
[  474.601396] Cannot link a netdevsim to itself
[  474.601507] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).