[  521.594847] netdevsim netdevsim537 eni537np1: renamed from eth1
[  521.692389] netdevsim netdevsim275 eni275np1: renamed from eth0
[  521.909094] Could not find device with ifindex 2000 in netnsfd 11
[  521.909336] Could not find netns with fd: 2000
[  521.909435] Cannot link a netdevsim to itself
[  521.909577] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).