[  488.231337] netdevsim netdevsim509 eni509np1: renamed from eth0
[  488.232708] netdevsim netdevsim680 eni680np1: renamed from eth1
[  488.323747] Could not find device with ifindex 2000 in netnsfd 11
[  488.323845] Could not find netns with fd: 2000
[  488.323887] Cannot link a netdevsim to itself
[  488.323936] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).