Junos OS Commands: What Show Route Does
The foundation command for monitoring all the routing information on your router is the show route command. This command has a host of various knobs and parameters that you can use to fine-tune your quest for knowledge, and following are the most useful versions of that command:
show route (no modifiers): The base show route command, issued with no modifiers, gives you a basic listing of the routes in your routing table. This information is helpful when you’re trying to figure out whether an expected route is actually present, which is typically a first step toward finding out why devices in your network are unreachable.
show route detail: This more detailed view of the routing information includes a significant amount of additional information for each route in the routing table, which is useful when troubleshooting routing issues. This command is typically the second step in diagnosing a routing problem (following the base show route command).
show route summary: The summary command gives you some high-level statistics about the routes that are in your routing table. It tells you how many routes are in the routing table for each protocol.
show route exact: The exact modifier allows you to see only a specific route or route prefix, which should be used in conjunction with the appropriate detail modifiers (brief, terse, detail, or extensive).