[  519.186043] netdevsim netdevsim620 eni620np1: renamed from eth1
[  519.283210] netdevsim netdevsim259 eni259np1: renamed from eth0
[  519.513067] Could not find device with ifindex 2000 in netnsfd 11
[  519.513231] Could not find netns with fd: 2000
[  519.513307] Cannot link a netdevsim to itself
[  519.513394] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).