[  835.695466][T15497] netdevsim netdevsim420 eni420np1: renamed from eth0
[  835.711234][T15500] netdevsim netdevsim636 eni636np1: renamed from eth1
[  836.469192][T15485] Could not find device with ifindex 2000 in netnsfd 11
[  836.470334][T15485] Could not find netns with fd: 2000
[  836.471155][T15485] Cannot link a netdevsim to itself
[  836.472264][T15485] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).