[  538.992509] netdevsim netdevsim462 eni462np1: renamed from eth0
[  539.093834] netdevsim netdevsim623 eni623np1: renamed from eth1
[  539.479110] Could not find device with ifindex 2000 in netnsfd 11
[  539.479290] Could not find netns with fd: 2000
[  539.479376] Cannot link a netdevsim to itself
[  539.479476] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).