[  486.328796] netdevsim netdevsim721 eni721np1: renamed from eth1
[  486.430057] netdevsim netdevsim335 eni335np1: renamed from eth0
[  486.768792] Could not find device with ifindex 2000 in netnsfd 11
[  486.768932] Could not find netns with fd: 2000
[  486.769012] Cannot link a netdevsim to itself
[  486.769107] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).