How to Determine Active and Operational Interfaces in Routers: A Step-by-Step Guide

Open the PT activity. Perform the tasks in the activity instructions and then answer the question.Which interfaces in each router are active and operational?

To determine the active and operational interfaces in each router, you would need to access the routers’ command-line interface (CLI) and view the interface status.

The specific commands to use may vary depending on the router’s operating system, but here are a few common ones:

1. Cisco IOS:

– Log in to the router’s CLI using SSH, Telnet, or console connection.
– Enter privileged EXEC mode using the command `enable`.
– Enter global configuration mode with the command `configure terminal`.
– Use the command `show ip interface brief` to display the status of all interfaces on the router. Active and operational interfaces will show an “up” status.
– Alternatively, you can use the command `show interfaces` followed by a specific interface name to view detailed information about that interface.

2. Juniper Junos:

– Establish a CLI session to the router through SSH, Telnet, or console.
– Enter operational mode using the command `cli` or `cli operational mode`.
– Use the command `show interfaces terse` to display a summary of interface status. Active interfaces will have a state of “up”.
– For more detailed information on a specific interface, use the command `show interfaces `.

3. MikroTik RouterOS:

– Connect to the router using SSH, Telnet, or Winbox.
– Access the router’s command-line interface by navigating to the “New Terminal” or “Console” section.
– Enter the command `/interface print` or `/interface monitor-traffic` to see a list of all interfaces and their respective status.

By executing these commands on each router, you should be able to identify the active and operational interfaces based on their status.

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