[  523.769866] netdevsim netdevsim630 eni630np1: renamed from eth1
[  523.867105] netdevsim netdevsim497 eni497np1: renamed from eth0
[  524.148217] Could not find device with ifindex 2000 in netnsfd 11
[  524.148450] Could not find netns with fd: 2000
[  524.148579] Cannot link a netdevsim to itself
[  524.148678] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).