[  523.512209] netdevsim netdevsim555 eni555np1: renamed from eth1
[  523.610324] netdevsim netdevsim450 eni450np1: renamed from eth0
[  523.856178] Could not find device with ifindex 2000 in netnsfd 11
[  523.856409] Could not find netns with fd: 2000
[  523.856522] Cannot link a netdevsim to itself
[  523.856656] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).