[  473.189611] netdevsim netdevsim506 eni506np1: renamed from eth0
[  473.190239] netdevsim netdevsim689 eni689np1: renamed from eth1
[  473.265279] Could not find device with ifindex 2000 in netnsfd 11
[  473.265372] Could not find netns with fd: 2000
[  473.265417] Cannot link a netdevsim to itself
[  473.265468] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).