[ 1251.908436][T12787] netdevsim netdevsim521 eni521np1: renamed from eth1
[ 1252.039438][T12791] netdevsim netdevsim308 eni308np1: renamed from eth0
[ 1254.672232][T12779] Could not find device with ifindex 2000 in netnsfd 11
[ 1254.674129][T12779] Could not find netns with fd: 2000
[ 1254.675639][T12779] Cannot link a netdevsim to itself
[ 1254.678181][T12779] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).