[ 483.229430] netdevsim netdevsim603 eni603np1: renamed from eth1 [ 483.329105] netdevsim netdevsim384 eni384np1: renamed from eth0 [ 483.658663] Could not find device with ifindex 2000 in netnsfd 11 [ 483.658814] Could not find netns with fd: 2000 [ 483.658886] Cannot link a netdevsim to itself [ 483.658975] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).