[  473.386319] netdevsim netdevsim504 eni504np1: renamed from eth0
[  473.386815] netdevsim netdevsim761 eni761np1: renamed from eth1
[  473.458050] Could not find device with ifindex 2000 in netnsfd 11
[  473.458141] Could not find netns with fd: 2000
[  473.458186] Cannot link a netdevsim to itself
[  473.458234] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).