[  435.536417] netdevsim netdevsim754 eni754np1: renamed from eth1
[  435.637439] netdevsim netdevsim300 eni300np1: renamed from eth0
[  435.999711] Could not find device with ifindex 2000 in netnsfd 11
[  435.999869] Could not find netns with fd: 2000
[  435.999961] Cannot link a netdevsim to itself
[  436.000060] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).