[ 1059.370769][T12131] netdevsim netdevsim259 eni259np1: renamed from eth0 [ 1059.479078][T12063] netdevsim netdevsim549 eni549np1: renamed from eth1 [ 1061.257681][T12723] Could not find device with ifindex 2000 in netnsfd 11 [ 1061.258716][T12723] Could not find netns with fd: 2000 [ 1061.259444][T12723] Cannot link a netdevsim to itself [ 1061.260232][T12723] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).