Million common configuration is here.

1. Cisco Virtual Lab Convenient startup-config
2. Router: Cisco IOSv Equipment Convenient startup-config with CML-P 2.0 ($137) · Snippets · GitLab

• ubuntu-0

#cloud-config
password: EgkhdSc5mwTu1cvrrk17zVC6NSKa7Y4AGSTDv2tHgfnwOVWvToCVDAHEKWKH1rl1
chpasswd: { expire: False }
hostname: ubuntu-0
ssh_pwauth: True
ssh_authorized_keys:
   - ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBIbn2VyO9Mby6BwkijQmGfH8O2+Uqewn0/oIOXOxMNgCZiztR3v2o5n1l9ET1GuN7iVMe9whoUiNuZMUVEv0INb+A6Yd0M/37tlWlC+qbIjjqL6UzJAqRISdGP1oVmnV2g== wnoguchi@lasthope.pg1x.net
package_upgrade: true
packages:
   - curl
   - ftp
   - iperf3
   - netcat-openbsd
   - bind-utils
write_files:
- path: /etc/netplan/51-cloud-init_static.yaml
  permissions: '0644'
  content: |
     network:
        version: 2
        ethernets:
           enp0s2:
              dhcp4: true
              dhcp6: true
              match:
                 name: enp0s2
           enp0s3:
              match:
                 name: enp0s3
              addresses:
                 - 10.1.1.200/24
              routes:
                 - to: 10.0.0.0/8
                   via: 10.1.1.1
                   metric: 0
              #gateway4: 198.168.255.1
              #nameservers:
              #   addresses:
              #      - 8.8.8.8
runcmd:
   - [ sudo, netplan, generate ]
   - [ sudo, netplan, apply ]

• ubuntu-1

#cloud-config
password: EgkhdSc5mwTu1cvrrk17zVC6NSKa7Y4AGSTDv2tHgfnwOVWvToCVDAHEKWKH1rl1
chpasswd: { expire: False }
hostname: ubuntu-1
ssh_pwauth: True
ssh_authorized_keys:
   - ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBIbn2VyO9Mby6BwkijQmGfH8O2+Uqewn0/oIOXOxMNgCZiztR3v2o5n1l9ET1GuN7iVMe9whoUiNuZMUVEv0INb+A6Yd0M/37tlWlC+qbIjjqL6UzJAqRISdGP1oVmnV2g== wnoguchi@lasthope.pg1x.net
package_upgrade: true
packages:
   - apache2
   - php
   - curl
   - vsftpd
   - ftp
   - iperf3
   - netcat-openbsd
   - bind-utils
write_files:
- path: /etc/netplan/51-cloud-init_static.yaml
  permissions: '0644'
  content: |
     network:
        version: 2
        ethernets:
           enp0s2:
              dhcp4: true
              dhcp6: true
              match:
                 name: enp0s2
           enp0s3:
              match:
                 name: enp0s3
              addresses:
                 - 10.2.2.201/24
              routes:
                 - to: 10.0.0.0/8
                   via: 10.2.2.1
                   metric: 0
              #gateway4: 198.168.255.1
              #nameservers:
              #   addresses:
              #      - 8.8.8.8
runcmd:
   - [ sudo, netplan, generate ]
   - [ sudo, netplan, apply ]

• R1

configure terminal
!
interface GigabitEthernet 0/0
 ip address 10.1.1.1 255.255.255.0
 no shutdown
interface GigabitEthernet 0/1
 ip address 10.2.2.1 255.255.255.0
 no shutdown
!
end