[ 1298.227493][T13021] netdevsim netdevsim375 eni375np1: renamed from eth0 [ 1298.342265][T13018] netdevsim netdevsim675 eni675np1: renamed from eth1 [ 1300.957630][T13009] Could not find device with ifindex 2000 in netnsfd 11 [ 1300.959428][T13009] Could not find netns with fd: 2000 [ 1300.960373][T13009] Cannot link a netdevsim to itself [ 1300.961788][T13009] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).