[  516.544263] netdevsim netdevsim630 eni630np1: renamed from eth1
[  516.640936] netdevsim netdevsim340 eni340np1: renamed from eth0
[  516.862449] Could not find device with ifindex 2000 in netnsfd 11
[  516.862621] Could not find netns with fd: 2000
[  516.862717] Cannot link a netdevsim to itself
[  516.862819] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).