[  488.304525] netdevsim netdevsim491 eni491np1: renamed from eth0
[  488.305132] netdevsim netdevsim750 eni750np1: renamed from eth1
[  488.396413] Could not find device with ifindex 2000 in netnsfd 11
[  488.396507] Could not find netns with fd: 2000
[  488.396548] Cannot link a netdevsim to itself
[  488.396602] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).