[ 522.265302] netdevsim netdevsim357 eni357np1: renamed from eth0 [ 522.362163] netdevsim netdevsim577 eni577np1: renamed from eth1 [ 522.641497] Could not find device with ifindex 2000 in netnsfd 11 [ 522.641715] Could not find netns with fd: 2000 [ 522.641807] Cannot link a netdevsim to itself [ 522.641915] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).