[  603.471364][ T8553] netdevsim netdevsim516 eni516np1: renamed from eth1
[  603.546741][ T8558] netdevsim netdevsim378 eni378np1: renamed from eth0
[  606.338408][ T8544] Could not find device with ifindex 2000 in netnsfd 11
[  606.340897][ T8544] Could not find netns with fd: 2000
[  606.341847][ T8544] Cannot link a netdevsim to itself
[  606.343073][ T8544] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).