[ 1246.017001][T12790] netdevsim netdevsim521 eni521np1: renamed from eth1
[ 1246.135368][T12792] netdevsim netdevsim380 eni380np1: renamed from eth0
[ 1248.854778][T12780] Could not find device with ifindex 2000 in netnsfd 11
[ 1248.855950][T12780] Could not find netns with fd: 2000
[ 1248.856876][T12780] Cannot link a netdevsim to itself
[ 1248.857960][T12780] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).