What does the 'show ip route' command do on a Cisco router?

The 'show ip route' command is a fundamental tool used on Cisco routers. Its primary function is to display the routing table of the router. This routing table contains essential information about how different networks are reachable through the router, including the networks, the next-hop addresses, and the routes' administrative distances. By using this command, network administrators can troubleshoot connectivity issues, understand the routes that the router is using to forward packets, and verify the status of dynamic routing protocols if they are in use.

Understanding the routing table's contents is crucial for effective network management, as it showcases all known destinations and the paths that packets should take to reach those destinations. It allows for a comprehensive view of the network's structure and helps in making informed decisions regarding routing policies and network adjustments.