[  485.067965] netdevsim netdevsim491 eni491np1: renamed from eth0
[  485.165533] netdevsim netdevsim750 eni750np1: renamed from eth1
[  485.381052] Could not find device with ifindex 2000 in netnsfd 11
[  485.381234] Could not find netns with fd: 2000
[  485.381311] Cannot link a netdevsim to itself
[  485.381399] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).