[  473.105588] netdevsim netdevsim437 eni437np1: renamed from eth0
[  473.106327] netdevsim netdevsim639 eni639np1: renamed from eth0
[  473.183497] Could not find device with ifindex 2000 in netnsfd 11
[  473.183589] Could not find netns with fd: 2000
[  473.183636] Cannot link a netdevsim to itself
[  473.183684] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).