[  473.873704] netdevsim netdevsim281 eni281np1: renamed from eth0
[  473.874297] netdevsim netdevsim721 eni721np1: renamed from eth1
[  473.954504] Could not find device with ifindex 2000 in netnsfd 11
[  473.954651] Could not find netns with fd: 2000
[  473.954765] Cannot link a netdevsim to itself
[  473.954893] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).