[ 484.274952] netdevsim netdevsim345 eni345np1: renamed from eth0 [ 484.375810] netdevsim netdevsim719 eni719np1: renamed from eth1 [ 484.750194] Could not find device with ifindex 2000 in netnsfd 11 [ 484.750374] Could not find netns with fd: 2000 [ 484.750473] Cannot link a netdevsim to itself [ 484.750592] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).