EC2-Ubuntu18.04-Swap-Dual_NIC-Setup.txt

sudo lsblk
sudo mkswap /dev/nvme1n1
sudo swapon -U 1aa13baa-f601-4269-9060-663ac77eef6b
echo 'UUID=1aa13baa-f601-4269-9060-663ac77eef6b none swap sw 0 0' | sudo tee -a /etc/fstab

sudo nano /etc/netplan/50-cloud-init.yaml

    ethernets:
        ens5:
          addresses:
          - 172.31.2.68/20
          - 172.31.4.172/20
          dhcp4: false
          match:
            macaddress: 09:1A:01:56:62:50
          gateway4: 172.31.0.1
          set-name: ens5
          nameservers:
            search: [us-east-2.compute.internal]
            addresses: [8.8.8.8, 8.8.4.4]

sudo nano /etc/netplan/51-ens6.yaml

network:
  version: 2
  renderer: networkd
  ethernets:
    ens6:
      addresses:
       - 172.31.22.77/20
       - 172.31.25.157/20
      dhcp4: no
      routes:
       - to: 0.0.0.0/0
         via: 172.31.16.1 # Default gateway
         table: 1000
       - to: 172.31.22.77
         via: 0.0.0.0
         scope: link
         table: 1000
       - to: 172.31.25.157
         via: 0.0.0.0
         scope: link
         table: 1000
      routing-policy:
        - from: 172.31.22.77
          table: 1000
        - from: 172.31.25.157
          table: 1000

sudo netplan --debug try