[  516.190776] netdevsim netdevsim721 eni721np1: renamed from eth1
[  516.288323] netdevsim netdevsim467 eni467np1: renamed from eth0
[  516.504606] Could not find device with ifindex 2000 in netnsfd 11
[  516.504853] Could not find netns with fd: 2000
[  516.504965] Cannot link a netdevsim to itself
[  516.505097] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).