[  522.548083] netdevsim netdevsim638 eni638np1: renamed from eth1
[  522.645611] netdevsim netdevsim259 eni259np1: renamed from eth0
[  522.898963] Could not find device with ifindex 2000 in netnsfd 11
[  522.899179] Could not find netns with fd: 2000
[  522.899271] Cannot link a netdevsim to itself
[  522.899374] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).