[ 1032.464712][T12732] netdevsim netdevsim272 eni272np1: renamed from eth0 [ 1032.554327][T12683] netdevsim netdevsim601 eni601np1: renamed from eth1 [ 1034.387685][T12727] Could not find device with ifindex 2000 in netnsfd 11 [ 1034.388986][T12727] Could not find netns with fd: 2000 [ 1034.390737][T12727] Cannot link a netdevsim to itself [ 1034.391835][T12727] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).