AWS/LinuxNetwork

Check that we are using the ENA addapter

use ethtool
```
$ sudo ethtool -i eth0
driver: ena
```

Check for AWS dropped packets due to overload

use ethtool

$ sudo ethtool -S eth0 | grep "drop\|buffer\|miss\|exceeded"
     bw_in_allowance_exceeded: 330628747
     bw_out_allowance_exceeded: 101
     pps_allowance_exceeded: 0
     conntrack_allowance_exceeded: 0
     linklocal_allowance_exceeded: 0
     queue_0_tx_llq_buffer_copy: 0
     queue_0_tx_missed_tx: 0
     queue_1_tx_llq_buffer_cop

High SI (see top) software interrupts

See overview in proc, looking for eth0/ena

$ cat /proc/interrupts
           CPU0       CPU1
 26:      77477          0   PCI-MSI 81920-edge      ena-mgmnt@pci:0000:00:05.0
 27:       1304  182777451   PCI-MSI 81921-edge      eth0-Tx-Rx-0
 28:        970  176892610   PCI-MSI 81922-edge      eth0-Tx-Rx-1