[  473.968733] netdevsim netdevsim321 eni321np1: renamed from eth0
[  473.969018] netdevsim netdevsim740 eni740np1: renamed from eth1
[  474.047079] Could not find device with ifindex 2000 in netnsfd 11
[  474.047172] Could not find netns with fd: 2000
[  474.047214] Cannot link a netdevsim to itself
[  474.047263] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).