[  615.516169][ T9943] netdevsim netdevsim509 eni509np1: renamed from eth0
[  615.523992][ T9940] netdevsim netdevsim519 eni519np1: renamed from eth1
[  616.186041][ T9928] Could not find device with ifindex 2000 in netnsfd 11
[  616.186893][ T9928] Could not find netns with fd: 2000
[  616.187690][ T9928] Cannot link a netdevsim to itself
[  616.188484][ T9928] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).