[ 486.484265] netdevsim netdevsim295 eni295np1: renamed from eth0 [ 486.585416] netdevsim netdevsim535 eni535np1: renamed from eth1 [ 486.933825] Could not find device with ifindex 2000 in netnsfd 11 [ 486.933968] Could not find netns with fd: 2000 [ 486.934033] Cannot link a netdevsim to itself [ 486.934134] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).