[ 1020.870601][T12133] netdevsim netdevsim461 eni461np1: renamed from eth0 [ 1020.967984][T12131] netdevsim netdevsim542 eni542np1: renamed from eth1 [ 1022.890268][T12453] Could not find device with ifindex 2000 in netnsfd 11 [ 1022.891312][T12453] Could not find netns with fd: 2000 [ 1022.891978][T12453] Cannot link a netdevsim to itself [ 1022.892765][T12453] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).