Here are some useful commands you can use configuring a network.

Show Commands:

show running-config: Displays the current running configuration of the device.

show ip interface brief: Provides a brief summary of the device's IP interfaces.

show version: Shows information about the device, including hardware and software versions.

Configuration Commands:

configure terminal (conf t): Enters global configuration mode.

interface [interface_type] [interface_number]: Allows you to enter interface configuration mode for a specific interface.

ip address [ip_address] [subnet_mask]: Configures the IP address on an interface.

Routing Commands:

show ip route: Displays the routing table of the device.

ip route [destination_network] [subnet_mask] [next_hop]: Adds a static route to the routing table.

Security Commands:

enable secret [password]: Sets an encrypted password for privileged mode access.

username [username] password [password]: Creates a local user with a password.

Monitoring Commands:

ping [destination_ip]: Tests reachability to a destination IP address.

traceroute [destination_ip]: Traces the route to a destination IP address.

SSH Configuration:

crypto key generate rsa: Generates RSA key pairs for SSH.

ip ssh version 2: Enables SSH version 2 for secure connections.

line vty 0 4: Enters VTY line configuration mode.

transport input ssh: Allows SSH as the transport protocol for VTY lines.

Save Configuration:

write memory or copy running-config startup-config: Saves the running configuration to the startup configuration, ensuring changes persist after a reboot.

Remember that the exact commands and their syntax may vary depending on the device and the Packet Tracer version you are using. Always refer to the specific device's documentation for accurate and up-to-date information.