When configuring a router, what is the primary function of the command 'show ip route'?

The command 'show ip route' is primarily used to display the router's routing table, which is essential for understanding how the router makes forwarding decisions for packets. The routing table contains all known routes to different network destinations, along with metrics indicating the best paths for traffic. By providing information on each route, such as the destination network, the subnet mask, the next hop, and how the route was learned (whether static, through a routing protocol, or directly connected), this command enables network administrators to assess and troubleshoot routing configurations effectively.

When analyzing routing issues or verifying the configuration of a network, the information presented by 'show ip route' is crucial. It allows you to see which routes are active, how they were added to the routing table, and whether the router can reach specific networks. This comprehensive view is vital for ensuring that the router is functioning as intended and efficiently routing traffic within a network.