[  489.206794] netdevsim netdevsim639 eni639np1: renamed from eth1
[  489.304346] netdevsim netdevsim455 eni455np1: renamed from eth0
[  489.524338] Could not find device with ifindex 2000 in netnsfd 11
[  489.524626] Could not find netns with fd: 2000
[  489.524731] Cannot link a netdevsim to itself
[  489.524863] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).